User:Kges1901/List of Oregon National Guard units by location

This is a list of historical and current Oregon National Guard (ONG) units, organized by location:

Albany
Albany is currently home to the 224th Engineer Company(-), 1249th Engineer Battalion and Troop A, 1st Squadron, 82nd Cavalry. Previous designations include: HQ, 2nd Bn, 249th CA was organized at Albany 17 April 1926, but relocated to Junction City 2 February 1931. A new unit, the Medical Detachment, CAC, ONG was organized and federally recognized on 13 April 1921.
 * 16 October 2005: Reorganized and redesignated as 224th Engineer Company(-)
 * 16 October 1999: Redesignated Company B, 52nd Engineer Battalion
 * 16 April 1994: Reorganized and redesignated as 224th Engineer Company
 * 14 June 1971: Converted, redesignated, and reorganized as Company C, 1249th Engineer Battalion
 * 1 March 1968: Consolidated as Battery C, 3rd Battalion, 249th Artillery
 * 15 November 1965: Reorganized and redesignated as 1st Platoon, Battery A and 1st Automatic Weapons Platoon, Battery B, 3rd Battalion, 249th Artillery
 * 15 May 1959: Converted, reorganized and redesignated as Battery C, 3rd Gun Battalion, 249th Artillery (battalion redesignated 3rd Automatic Weapons Battalion, 249th Artillery 1 November 1961)
 * 6 July 1953: Redesignated Company C, 162nd Infantry (swapped designations with Eugene unit)
 * 2 March 1948: Federally recognized as Company L, 162nd Infantry
 * 15 September 1945: Inactivated at Fort Canby
 * 18 October 1944: Redesignated Battery B, 171st Coast Artillery Battalion
 * 16 September 1940: Inducted into Federal service
 * 14 April 1940: Redesignated Battery D, 249th CA
 * 18 April 1924: Redesignated Battery A, 249th CA
 * 12 December 1923: Redesignated Battery A, 249th Artillery, CAC
 * 31 March 1922: Reorganized and federally recognized as 483rd Company, CAC, ONG
 * 22 March 1921: Reorganized and federally recognized as 4th Company, CAC, ONG
 * 14 December 1918: Demobilized at Fort Canby
 * 15 January 1918: Redesignated 5th Company, Coast Defenses of the Columbia
 * 5 August 1917: Drafted into Federal service at Fort Stevens
 * 13 December 1911: Converted and redesignated 5th Company, Coast Artillery Corps (CAC), ONG
 * 17 July 1907: Reorganized as Company G, 4th Infantry, ONG
 * 15 July 1903: Redesignated as Company G, 3rd Infantry, ONG
 * 3 May 1900: Redesignated Company G, 4th Infantry, ONG
 * 14 April 1900: Reorganized as Company G, Separate Battalion
 * 7 August 1899: Mustered out of Federal service at San Francisco
 * May 1898: Mustered into Federal service and consolidated with Separate Company F as Company I, 2nd Oregon Volunteer Infantry
 * 28 June 1887: Organized as Company F, 2nd Infantry Regiment, ONG

Ashland
Currently HHC, 1st Battalion, 186th Infantry Location of HQ, 2nd Bn, 249th CA changed from Medford to Ashland 11 June 1937, changed again to Salem 15 April 1940.
 * 1 March 1968: Converted, reorganized and redesignated as HHC(-), 1st Battalion, 186th Infantry
 * 15 May 1959: Reorganized and redesignated HHB, 2nd Gun Battalion, 249th Artillery
 * 12 May 1949: Battery A reorganized and redesignated as HHB, 732nd Antiaircraft Artillery Gun Battalion
 * 20 May 1948: Federally recognized as Medical Detachment, 965th Field Battalion (redesignated 732nd Antiaircraft Artillery Gun Battalion 13 January 1949)
 * 13 November 1947: Federally recognized as Battery A of the 965th Field Artillery Battalion (redesignated 732nd Antiaircraft Artillery Gun Battalion 13 January 1949)
 * 30 June 1919: Organized and federally recognized as a new unit, 1st Company, CAC ONG

Astoria

 * 1 March 1968: Reorganized and redesignated as 162nd Engineer Company(-)
 * 15 November 1965: Reorganized as 162nd Engineer Company (Part) (Select Reserve Force) and Company E (Bridge), 162nd Engineer Battalion
 * 1 March 1963: Redesignated as Company E (Bridge), 162nd Engineer Battalion
 * 1 January 1961: Converted to Company B, 162nd Engineer Battalion
 * 15 May 1959: Redesignated as Company E, 1st Battle Group, 162nd Infantry
 * 25 June 1947: Federally recognized as Company L, 186th Infantry

Baker City
Baker City is currently home to Company F, 145th Brigade Support Battalion. The Baker City Rifles were organized as the first Oregon militia unit in the area in 1883 and designated Company A, 1st Regiment, 3rd Brigade; they became Company A of the 3rd Infantry Regiment when the Oregon National Guard was established in 1887, but were disbanded the same year. Company F of the 3rd Infantry Regiment was organized in Baker City in 1889 and was called out on 10 April 1892 to prevent the lynching of two murder suspects at Vale; it disbanded in 1896. During the Spanish–American War, 56 out of 109 members of Light Battery B, Oregon Volunteers were from Baker County, but the war ended before they left the state. Company A of the 3rd Infantry Regiment was organized at Baker City as the first new unit organized in the Oregon National Guard after the end of the war on 23 July 1899. Due to lack of efficiency and attendance, the company was disbanded in 1913.
 * 3 September 2002: Reorganized and redesignated as Detachment 1, Company A, 3rd Battalion, 116th Cavalry, an M1A1 Abrams tank platoon, and Detachment 2, Company B, 145th Support Battalion, a mobile support team of a direct support maintenance company
 * 1 September 1989: Reorganized and redesignated as Company A, 3rd Battalion, 116th Cavalry
 * 1 March 1968: Redesignated as Detachment 1, HHT, 3rd Squadron, 163rd Armored Cavalry, consisting of the squadron mortar and reconnaissance platoons (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1963: Redesignated as Company A, 2nd Battalion, 186th Infantry
 * 15 May 1959: Redesignated as Company A, 1st Battle Group, 186th Infantry
 * 17 September 1947: Reorganized and Federally recognized as Company F, 186th Infantry
 * 16 September 1940: Inducted into Federal service, inactivated 31 December 1945 in Japan
 * 19 May 1924: Redesignated as Company F, 186th Infantry
 * 21 March 1924: Organized and Federally recognized as Company F, 162nd Infantry

Company F of the 2nd Battalion, 186th Infantry organized as the Baker National Guard unit in 1924, and by 1939 had a strength of 54 enlisted men. The company fought in World War II with the 41st Infantry Division, and was reorganized postwar in 1947. State active duty included forest fire fighting in Wallowa and Whitman National Forests, July to August 1960, flood duty in February 1963, forest fire fighting in Wallowa County, August to September 1988, fire fighting in the Malheur National Forest 1990.

Bend
Bend is currently home to Company D(-), 141st Brigade Support Battalion, and HHT, 1st Squadron, 82nd Cavalry Regiment.


 * c. 2005: HHT, 1st Squadron, 82nd Cavalry
 * 1 February 1972: Redesignated as Detachment 1, Company M, 3rd Squadron, 163rd Armored Cavalry (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1968: Redesignated as Company M, 3rd Squadron, 163rd Armored Cavalry
 * 1 March 1963: Redesignated as Company C, 2nd Battalion, 303rd Armor
 * 15 May 1959: Redesignated as Battery D, 1st Automatic Weapons Battalion, 249th Artillery
 * 27 February 1948: Reorganized and Federally recognized
 * 16 September 1940: Inducted into Federal service, inactivated 31 December 1945 at Kure, Japan
 * 1 February 1937: Redesignated Company I, 162nd Infantry
 * 27 May 1926: Organized and Federally recognized as Howitzer Company, 162nd Infantry

Burns
The Burns unit of the National Guard was last part of an engineer company, designated Detachment 1, Company D, 141st Brigade Support Battalion, 41st Infantry Brigade Combat Team. The unit traces its existence back to 1949, with previous unit designations as follows:


 * 1 October 1995: Consolidated, converted, reorganized, and redesignated as Detachment 1, Company A, 1249th Engineer Battalion (Mechanized)
 * 1 September 1989: Converted, reorganized, and redesignated as Detachment 1, HHC, 1st Battalion, 82nd Cavalry and Detachment 1, HHB, 1st Battalion, 148th Field Artillery
 * 1 March 1968: Converted Detachment 1, Troop L, 3rd Squadron, 163rd Armored Cavalry Regiment (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1963: Redesignated as Company A, 2nd Battalion, 303rd Armor
 * 1 May 1961: Redesignated Battery A, 1st Automatic Weapons Battalion, 249th Artillery
 * 15 May 1959: Reorganized under Pentomic structure as Battery A, 2nd Gun Battalion, 249th Artillery
 * 13 May 1949: Organized and Federally recognized as Battery A, 732nd Antiaircraft Artillery Gun Battalion (redesignated 16 July 1951 as 732nd Antiaircraft Artillery Automatic Weapons Battalion, 1953 as Battery A, 732nd Antiaircraft Artillery Battalion)

The first Oregon National Guard unit in Burns was Troop A, Cavalry, organized in September 1893, but it was mustered out in 1896 for "expiration of service" and there would be no presence in the town again until after World War II. State active duty included firefighting in the Malheur National Forest, August 1990. Mobilized with 1249th Engineer Battalion March 2003 for a year of federal active duty to take on homeland security responsibilities.

The Burns armory, completed in 1955, was closed in 2013 after the Burns unit was re-stationed in Bend with the rest of Company D.

Coos Bay

 * By 2016: Reorganized and redesignated as Detachment 1, Company C, 1st Battalion, 186th Infantry and Detachment 1, Company H, 141st Brigade Support Battalion
 * c. 1 September 2006: Redesignated, converted and reorganized as Company B(-), 1st Battalion, 186th Infantry, and Detachment 1, Company F (Infantry Forward Support), 141st Brigade Support Battalion
 * c. early 2003: Redesignated Company D, 2nd Battalion, 162nd Infantry
 * 1 October 1995: Converted, reorganized and redesignated as Company E, 2nd Battalion, 162nd Infantry
 * 14 June 1971: Converted, reorganized and redesignated as Company A, 1249th Engineer Battalion
 * 1 March 1968: Reorganized as Battery A, 3rd Battalion, 249th Artillery
 * 15 November 1965: Reorganized as Battery A(-), 3rd Battalion, 249th Artillery (Select Reserve Force)
 * 15 May 1959: Converted, reorganized and redesignated as Battery A, 3rd Gun Battalion, 249th Artillery (battalion redesignated 3rd Automatic Weapons Battalion, 249th Artillery 1 November 1961)
 * 7 April 1948: Federally recognized as Heavy Mortar Company, 186th Infantry
 * 12 December 1923: Redesignated Battery C, 249th Coast Artillery
 * 31 March 1922: Redesignated 485th Company, CAC
 * 26 February 1920: Redesignated 2nd Company, CAC, ONG


 * 30 June 1919: Reorganized at Marshfield, Coos Bay as Company A, 3rd Infantry Regiment, ONG
 * July 1917: Mustered into federal service, served at Fort Stevens during war
 * 12 August 1916: Organized at Marshfield as 11th Company, CAC, ONG

Corvallis
Corvallis is currently home to Company B, 2nd Battalion, 162nd Infantry. Before the permanent National Guard presence began in 1912, Corvallis residents formed much of Company A, 1st Oregon Infantry between 1864 and 1866, maintained Company C, 3rd Regiment, 2nd Brigade of the state militia between 1865 and 1867, and Company E, 2nd Regiment, ONG between 6 July 1887 and 1891.
 * By 1993: Redesignated as Company B, 2nd Battalion, 162nd Infantry
 * 1 March 1968: Redesignated as Company C, 2nd Battalion, 162nd Infantry
 * 15 November 1965: Reorganized as Company A (Part), 1st Battalion, 162nd Infantry (Select Reserve Force) and Company C, 2nd Battalion, 162nd Infantry
 * 1 March 1963: Reorganized and redesignated as Company B, 1st Battalion, 162nd Infantry
 * 15 May 1959: Reorganized and redesignated as Combat Support Company, 2nd Battle Group, 186th Infantry
 * 10 November 1947: Federally recognized as Company M, 162nd Infantry
 * 16 September 1940: Inducted into Federal service
 * 24 March 1921: Redesignated as Company M, 162nd Infantry
 * 1 February 1921: Federally recognized as Machine Gun Company, 5th Infantry
 * 2 October 1917: Reorganized as Company K, 162nd Infantry
 * 5 August 1917: Drafted into federal service
 * 25 March 1917: Called into federal service at Camp Withycombe
 * 25 September 1916: Mustered out of federal service at Camp Clackamas
 * 19 June 1916: Mustered into federal service for Mexican border duty
 * 5 December 1913: Redesignated as Company K, 3rd Infantry
 * 6 January 1912: Organized as Company D, 3rd Infantry

Cottage Grove
The Cottage Grove Armory was closed in 2009 when HHC, 2nd Battalion, 162nd Infantry relocated to Springfield.
 * 1979: Reorganized as HHC, 2nd Battalion, 162nd Infantry
 * 1 March 1968: Reorganized as Detachment 1, Company C, 1st Battalion, 186th Infantry
 * 1959: Company B, 2nd Battle Group, 186th Infantry
 * 18 November 1952: Redesignated Company B, 186th Infantry
 * 5 August 1947: Federally recognized as Heavy Mortar Company, 162nd Infantry

Dallas
Dallas is currently home to the 162nd Engineer Company. Previous designations included the following:
 * By 2006 redesignated 162nd Engineer Company
 * 30 September 1980: Reorganized as Company B, 1249th Engineer Battalion (battalion redesignated as 1249th Engineer Battalion (Mechanized) 16 April 1994 and reverted to original designation 1 October 1995)
 * 1 March 1975: Redesignated Company B(-), 1249th Engineer Battalion
 * 17 June 1971: Converted, reorganized, and redesignated as Detachment 1, Company B, 1249th Engineer Battalion
 * 1 March 1968: Converted, reorganized, and redesignated as Detachment 1, Battery B, 3rd Battalion (Automatic Weapons) (Self-Propelled), 249th Artillery (Selected Reserve Force)
 * 15 May 1959: Converted to Troop A, 1st Reconnaissance Squadron, 82nd Armor (Squadron redesignated 1st Squadron, 82nd Cavalry 1 March 1963)
 * 1 November 1948: Converted to Tank Company (Medium), 162nd Infantry
 * 11 November 1947: Federally recognized as Anti-Tank Company, 162nd Infantry Regiment
 * 26 October 1920: Federally recognized as Company L, 162nd Infantry Regiment
 * 5 May 1920: Reorganized and redesignated as Company L, 5th Infantry, ONG
 * 30 June 1919: Federally recognized as Company L, 3rd Infantry, ONG
 * 1 March 1919: Demobilized at Fort Dix
 * 2 October 1917: Redesignated Company L, 162nd Infantry
 * 28 March 1917: Mustered into federal service
 * 25 September 1916: Mustered out of federal service
 * 19 June 1916: Mustered into federal service for Mexican border duty
 * 5 December 1913: Redesignated Company L, 3rd Regiment of Infantry, ONG
 * 6 January 1913: Reconstituted as Company G, 3rd Regiment of Infantry, ONG
 * 8 August 1912: Company G, 3rd Regiment of Infantry, ONG disbanded
 * 13 December 1911: Redesignated Company G, 3rd Regiment of Infantry, ONG
 * 30 June 1908: Organized as Company H, 4th Regiment of Infantry, ONG

Eugene

 * 1968: HHC, 2nd Battalion, 162nd Infantry
 * 1965: HHC, 2nd Battalion, 162nd Infantry and Company C, 1st Battalion, 162nd Infantry (Select Reserve Force)
 * 1963: HHC, 2nd Battalion, 162nd Infantry and Company A, 2nd Battalion, 162nd Infantry
 * By 1962: HHC and Company E, 2nd Battle Group, 186th Infantry
 * 1959: HHC and Company A (part), 2nd Battle Group, 186th Infantry
 * By 1958: Companies K and L, 162nd Infantry
 * 15 March 1948: Federally recognized as Company K, 162nd Infantry
 * 22 September 1947: Federally recognized as Company C, 162nd Infantry

Forest Grove

 * 1959: Company C, 1st Battle Group, 162nd Infantry
 * 12 February 1947: Federally recognized as HHC, 3rd Battalion, 186th Infantry

Grants Pass

 * 1 March 1968: Reorganized as Detachment 1, HHC, 1st Battalion, 186th Infantry
 * 15 May 1959: Company C, 2nd Battle Group, 186th Infantry
 * 23 September 1947: Federally recognized as Company C, 186th Infantry

Gresham
Troop B, Oregon Cavalry was organized at Gresham on 27 October 1896 but disbanded on 30 June 1898.
 * By 2010: Company C, 2nd Battalion, 162nd Infantry
 * By 1996: Company C, 1st Battalion, 162nd Infantry
 * 1 March 1963: Redesignated as Battery C, 2nd Battalion, 218th Artillery (assigned to 41st Infantry Brigade (Selected Reserve Force) 15 November 1965, 41st Infantry Brigade (Separate) 1 March 1968)
 * 15 May 1959: Reorganized and redesignated as Battery C, 1st Battalion, 249th Artillery
 * 31 January 1950: Organized and federally recognized as Battery C, 722nd Antiaircraft Artillery Gun Battalion
 * 30 January 1922: Federally recognized as Headquarters Company, 1st Battalion, 186th Infantry

Hillsboro

 * 1 January 1961: Redesignated Company E, 1st Battle Group, 162nd Infantry
 * 15 May 1959: Redesignated Company D, 1st Battle Group, 186th Infantry
 * 12 January 1948: Federally recognized as Company I, 186th Infantry

Hood River

 * 1 February 1972: Redesignated as Detachment 1, Troop K, 3rd Squadron, 163rd Armored Cavalry (squadron redesignated 3rd Squadron, 116th Armored Cavalry 1 May 1974)
 * 1 March 1968: Redesignated as Troop K, 3rd Squadron, 163rd Armored Cavalry
 * 1 March 1963: Redesignated as Company C, 162nd Engineer Battalion
 * 1 January 1961: Redesignated as Company D, 1st Battle Group, 186th Infantry
 * 28 October 1949: Federally recognized as Company D, 162nd Engineer Battalion (Combat) (battalion redesignated 1 August 1953 as 162nd Engineer Battalion)

Junction City
HQ, 2nd Bn, 249th CA location changed from Albany to Junction City 2 February 1931, but location changed again to Klamath Falls 8 May 1931.

Klamath Falls
Klamath Falls is currently home to Troop C, 1st Squadron, 82nd Cavalry, part of the 41st Infantry Brigade Combat Team. Previous unit designations include: The first National Guard unit in the city was organized in Klamath Falls when it was still named Linkville in November 1889, but was disbanded in 1896 for not meeting standards. It was not until the 1927 organization of Battery D of the 249th Coast Artillery that there would be a permanent presence in the city. The location of Headquarters, 2nd Battalion, 249th Coast Artillery was changed from Junction City to Klamath Falls on 8 May 1931 but was swiftly changed again to Medford on 1 April 1932. Just before World War II, the battery was split into Batteries A and C of the 249th, and they manned harbor defense forts during the war. Reorganized in 1947 as field artillery, the Klamath Falls antiaircraft artillery batteries were consolidated into an infantry company in 1968. Half the unit, numbering 40 members, volunteered to be mobilized with Company B of the 1st Battalion, 186th Infantry in 2000, spending four months securing Patriot missile batteries during Operation Southern Watch. With the battalion, the company was rotated into Sinai for six months of peacekeeping duty under the Multinational Force and Observers mission in July 2002.
 * 26 August 2000: Reorganized and redesignated as Company B, 1st Battalion, 186th Infantry
 * 1 October 1995: Reorganized and redesignated as Detachment 1, HHC, 1st Battalion, 186th Infantry
 * 1 September 1989: Converted, reorganized and redesignated as Company B, 1st Battalion, 82nd Cavalry (Mechanized)
 * 1 March 1968: Both batteries consolidated, converted, reorganized and redesignated as Company B, 1st Battalion, 186th Infantry, 41st Infantry Brigade
 * 15 May 1959: All three batteries consolidated, reorganized and redesignated as Batteries B and C, 2nd Gun Battalion (Skysweeper), 249th Artillery (battalion redesignated 1 May 1961 as 2nd Automatic Weapons Battalion (Self-Propelled), 249th Artillery)
 * 1 March 1957: Location of Battery C, 732nd Antiaircraft Artillery Gun Battalion changed from Lakeview to Klamath Falls
 * 13 January 1949: Service and HHB consolidated as HHB, 732nd Antiaircraft Artillery Battalion (90 mm), location changed to Ashland May. Batteries B and D of the 732nd reorganized from Battery B of the 965th Field Artillery Battalion. (Battalion redesignated 732nd Antiaircraft Artillery Gun Battalion (Mobile) on 16 July 1951 and 732nd Antiaircraft Artillery Battalion (75mm Gun) on 1 March 1956)
 * 10 December 1947: Service Battery, 965th Field Artillery Battalion organized and federally recognized
 * 13 November 1947: Reconstituted, organized, and federally recognized as HHB and Battery B, 965th Field Artillery Battalion
 * 15 September 1945: Inactivated
 * 18 October 1944: Battery C redesignated Battery A, 171st Coast Artillery Battalion (Harbor Defense), Battery B redesignated under 249th Coast Artillery Battalion (Harbor Defense)
 * 16 September 1940: Batteries A and C, 249th Coast Artillery ordered into Federal service
 * 22 April 1940: Battery C, 249th Coast Artillery organized and Federally recognized
 * April 1940: Reorganized and redesignated as Batteries A and C, 249th Coast Artillery Regiment
 * 23 September 1927: Organized and federally recognized as Battery D, 249th Coast Artillery Regiment

La Grande
Currently HHC(-), 3rd Battalion, 116th Cavalry
 * 1 March 1968: Converted to HHT, 3rd Squadron, 163rd Armored Cavalry (redesignated 3rd Squadron, 116th Armored Cavalry 1 May 1974)
 * 1 March 1963: Redesignated HHC, 2nd Battalion, 186th Infantry
 * 15 May 1959: Redesignated HHC, 1st Battle Group, 186th Infantry
 * 23 June 1947: Federally recognized as Company E, 186th Infantry
 * Ordered into Federal service 16 September 1940, inactivated 31 December 1945 in Japan
 * 19 May 1924: Redesignated Company E, 186th Infantry
 * 18 March 1924: Organized and Federally recognized as Company E, 162nd Infantry

Lake Oswego

 * By 1977: 162nd Engineer Company
 * 1 March 1968: Reorganized as Battery D, 3rd Battalion, 249th Artillery
 * 1959: Battery A, 1st Battalion, 249th Artillery

Lakeview
Lakeview's first and only National Guard unit, Battery C, struggled with manning and was nearly inactivated for lack of manpower in 1951. By 1956 it still had just 22 men, less than a quarter of its authorized strength, attending annual training. The unit was notified that it would be disbanded if it did not find more men in 1956, but a recruiting drive failed to change the situation. As a result, the unit location was changed in 1957 to Klamath Falls, where two other batteries of the 732nd were already stationed in the new armory there, ending Lakeview's brief history as host of a National Guard unit.
 * 1 March 1957: Location changed to Klamath Falls
 * 1 February 1949: Converted, redesignated and reorganized as Battery C, 732nd Antiaircraft Artillery Gun Battalion
 * 11 December 1947: Organized and Federally recognized as Battery C, 965th Field Artillery Battalion

Lebanon
The presence of the National Guard in Lebanon ended when Troop A, 1st Squadron, 82nd Cavalry relocated to Albany by 2021. Troop A, Cavalry, ONG had been active at Lebanon between 1899 and 1906.
 * 1 September 2006: Redesignated Troop A, 1st Squadron, 82nd Cavalry
 * 1 October 1995: Reorganized as Troop F, 82nd Cavalry, 29th Infantry Brigade
 * 1 September 1992: Converted, reorganized, and redesignated as Company A, 1st Battalion, 82nd Cavalry
 * 1 September 1989: Reorganized and redesignated as Company D, 2nd Battalion, 162nd Infantry
 * 1 June 1985: Reorganized and redesignated as Support Company, 2nd Battalion, 162nd Infantry
 * 1 September 1981: Reorganized and redesignated as Support Company(-), 2nd Battalion, 162nd Infantry
 * 30 September 1980: Reorganized and redesignated as Support Company, 2nd Battalion, 162nd Infantry
 * 1 April 1979: Reorganized and redesignated as Support Company(-), 2nd Battalion, 162nd Infantry
 * 1 March 1968: Reorganized and redesignated as Detachment 1, Company B, 2nd Battalion, 162nd Infantry
 * 15 November 1965: Reorganized and redesignated as Company A(-), 2nd Battalion, 162nd Infantry (Select Reserve Force)
 * 1 March 1963: Reorganized and redesignated as Company C, 1st Battalion, 162nd Infantry
 * 1 January 1961: Reorganized as Company A, 2nd Battle Group, 186th Infantry
 * 15 May 1959: Reorganized and redesignated as Company A(-), 2nd Battle Group, 186th Infantry
 * 10 December 1947: Federally recognized as HHC, 3rd Battalion, 162nd Infantry
 * 31 December 1945: Inactivated at Kure, Japan
 * 14 February 1942: Reorganized and redesignated as Clearing Company, 116th Medical Battalion
 * 16 September 1940: Inducted into federal service
 * 1 December 1939: Reorganized and redesignated as Company H, 116th Medical Regiment
 * 1 June 1937: Redesignated Company I, 116th Medical Regiment
 * 23 May 1922: Redesignated Hospital Company No. 167
 * 31 March 1922: Redesignated Hospital Company No. 146
 * 30 June 1921: Federally recognized as Field Hospital Company, ONG

McMinnville

 * 1959: Company A, 1st Battle Group, 162nd Infantry
 * 4 June 1947: Federally recognized as Company A, 162nd Infantry

Medford
Location of HQ, 2nd Bn, 249th CA changed to Medford from Klamath Falls 1 April 1932, changed to Ashland on 11 June 1937
 * 1 March 1968: Converted, reorganized and redesignated as Company A, 1st Battalion, 186th Infantry
 * 15 May 1959: Converted, reorganized, and redesignated as Batteries A and D, 2nd Gun Battalion, 249th Artillery
 * 26 June 1947: Federally recognized as HHC, 1st Battalion, 186th Infantry
 * 3 November 1947: Federally recognized as Company A, 186th Infantry

Milton-Freewater
Milton-Freewater is currently home to Detachment 1, 1186th Military Police Company.


 * By 2003, Detachment 1, 1186th Military Police Company
 * 1 March 1968: Redesignated as Detachment 1, Troop I, 3rd Squadron, 163rd Armored Cavalry (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1963: Redesignated as Detachment 1, HHC, 2nd Battalion, 186th Infantry
 * 15 May 1959: Redesignated as Company C, 1st Battle Group, 186th Infantry
 * 3 March 1947: Organized and Federally recognized as HHC, 2nd Battalion, 186th Infantry

Myrtle Creek
Myrtle Creek lost its National Guard unit when the location of Company B was changed to Cottage Grove in a reshuffling of units, and its men were transferred to Company D, 186th Infantry at Roseburg.
 * 18 November 1952: Location of Company B, 186th Infantry changed to Cottage Grove
 * 12 August 1948: Federally recognized as Company B, 186th Infantry

Newberg

 * 1959: Battery B, 3rd Battalion, 218th Artillery
 * 23 October 1947: Federally recognized as Battery C, 218th Field Artillery Battalion

Newport
Since 2005, has been home to Detachment 1, 224th Engineer Company.
 * 1 March 1968: Reorganized as Battery B, 3rd Battalion, 249th Artillery
 * 1959: Battery B, 3rd Battalion, 249th Artillery
 * 24 March 1920: Organized and federally recognized as a new unit as 3rd Company, CAC, ONG

Ontario
The Ontario unit of the National Guard is currently a tank company designated Company C, 3rd Battalion, 116th Cavalry, 116th Cavalry Brigade Combat Team. The unit traces its existence back to 1948, with previous unit designations as follows:


 * 2005–2006: reorganized under modular structure as Company C, 3rd Battalion, 116th Cavalry, part of 116th Cavalry Brigade Combat Team
 * October 1999: converted and redesignated Company A(-), 3rd Battalion, 116th Cavalry
 * 1 October 1995: converted and reorganized Company D, 3rd Battalion, 116th Cavalry and Detachment 2, HHB, 1st Battalion, 148th Field Artillery
 * 1 September 1989: converted Battery C, 1st Battalion, 148th Field Artillery
 * 31 May 1979: converted Howitzer Battery, 3rd Squadron, 116th Armored Cavalry Regiment
 * 1 March 1968: converted Troop L(-), 3rd Squadron, 163rd Armored Cavalry Regiment (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 15 November 1965: reorganized as Company C, 2nd Battalion, 186th Infantry, 41st Infantry Division
 * 31 December 1964: reorganized as Company C(-), 2nd Battalion, 186th Infantry, 41st Infantry Division
 * 1 March 1963: reorganized under ROAD structure as Company C, 2nd Battalion, 186th Infantry, 41st Infantry Division
 * 1 January 1961: converted Combat Support Company, 1st Battle Group, 186th Infantry, 41st Infantry Division
 * 15 May 1959: reorganized under Pentomic structure as Company E, 1st Battle Group, 186th Infantry, 41st Infantry Division
 * 16 August 1948: Federally recognized as a heavy weapons company designated Company H, 2nd Battalion, 186th Infantry, 41st Infantry Division

The Ontario armory, a motor vehicle storage building, opened in 1950, was expanded from a temporary quonset hut that housed the unit vehicles from 1948. The unit has seen state active duty for forest fires in the Wallowa and Whitman National Forest s (July–August 1960), local storm damage cleanup (August 1975), April 1984 flood at Owyhee Junction, January 1986 Snake River flooding at Ontario and Vale, forest firefighting in Wallowa County (August–September 1988), and fire-fighting in the Malheur National Forest (August 1990). With the brigade, the unit deployed to Iraq for eighteen months from June 2004 to November 2005. A second Iraq deployment followed from September 2010 to September 2011.

Oregon City
Post-Cold War budget cuts forced the closure of the armory as the state was no longer able to afford all of its armories. The National Guard departed from the Oregon City armory in 1993 when Troop F, 116th Cavalry relocated to Clackamas.
 * 30 June 1993: Relocated to Clackamas
 * 15 November 1992: Converted, consolidated, reorganized and redesignated as Troop F, 116th Cavalry
 * 1 September 1992: Reorganized as Company A(-), 1st Battalion, 162nd Infantry
 * 1 December 1978: Reorganized as Company A, 1st Battalion, 162nd Infantry
 * 1 March 1968: Reorganized and redesignated as Company A(-), 1st Battalion, 162nd Infantry
 * 15 November 1965: Reorganized and redesignated as Company A, 1st Battalion, 186th Infantry (Select Reserve Force)
 * 1 May 1963: Reorganized and redesignated as Company A, 1st Battalion, 162nd Infantry
 * 15 May 1959: Reorganized and redesignated as Combat Support Company, 1st Battle Group, 162nd Infantry
 * 18 November 1952: Reorganized and redesignated as Heavy Mortar Company, 162nd Infantry Regiment
 * 9 December 1947: Federally recognized as Company D, 162nd Infantry Regiment
 * 31 December 1945: Inactivated at Kure, Japan
 * 16 September 1940: Inducted into federal service
 * 11 January 1927: Reorganized and redesignated Company D, 186th Infantry Regiment
 * 19 August 1924: Reconstituted and federally recognized as HHC, 2nd Battalion, 162nd Infantry Regiment
 * 1 March 1919: Demobilized at Fort Dix
 * 2 October 1917: Reorganized as Company G, 162nd Infantry Regiment
 * 25 March 1917: Called into federal service at Camp Withycombe
 * 25 September 1916: Mustered out of federal service at Camp Clackamas
 * 19 June 1916: Mustered into federal service for Mexican border duty
 * 5 December 1913: Redesignated Company G, 3rd Infantry Regiment, ONG
 * 20 May 1912: Converted, reorganized and redesignated as Company L, 3rd Infantry Regiment, ONG
 * 13 December 1911: Converted, reorganized and redesignated as 7th Company, CAC, ONG
 * 13 May 1907: Reconstituted as Company G, 3rd Infantry Regiment, ONG
 * 15 July 1903: Disbanded
 * 1 May 1900: Redesignated Company A, 3rd Infantry Regiment, ONG
 * 2 November 1898: Separate Company F, ONG reorganized at Oregon City as a new unit
 * 7 August 1899: Company I mustered out of federal service at San Francisco
 * 14 May 1898: Mustered into federal service as Company I, 2nd Oregon Volunteer Infantry Regiment
 * 30 April 1898: Separate Company F consolidated with Company F, 2nd Infantry Regiment, ONG (Albany) to become Company I
 * 25 May 1897: redesignated Separate Company F, ONG
 * June 1889: Company F, 1st Infantry Regiment, ONG
 * 27 December 1880: Company E, 1st Regiment, 2nd Brigade, Oregon State Militia
 * 13 December 1864–22 November 1865: Company E, 1st Oregon Volunteer Infantry Regiment
 * 25 February 1856: Company E, Battalion of Recruits, 1st Regiment of Oregon Mounted Volunteers
 * 20 September 1854: HQ and Company C, 2nd Regiment of Oregon Militia
 * 9 December 1847–February 1848: First Company, Oregon Riflemen

Pendleton
Currently Detachment 1, HHC, 3rd Battalion, 116th Cavalry
 * 1 March 1968: Converted and redesignated as Troop I, 3rd Squadron, 163rd Armored Cavalry (redesignated 3rd Squadron, 116th Armored Cavalry 1 May 1974)
 * 1 March 1963: Redesignated as Company B, 2nd Battalion, 186th Infantry
 * 15 May 1959: Reorganized under Pentomic structure as Company B, 1st Battle Group, 186th Infantry
 * 12 March 1948: Federally recognized as Company G, 186th Infantry and 2nd Battalion Platoon, Medical Company, 186th Infantry
 * Ordered into Federal service 16 September 1940, inactivated 31 December 1945 in Japan
 * 1 July 1926: Redesignated as Company G, 186th Infantry
 * 5 April 1926: Organized and Federally recognized as Company L, 186th Infantry

Portland

 * 11 February 1947: Federally recognized as Service Company, 186th Infantry
 * 26 February 1947: Federally recognized as Headquarters (part), 41st Infantry Division
 * 10 April 1947: Federally recognized as HHB, 218th Field Artillery Battalion
 * 29 April 1947: Federally recognized as HHC, 2nd Battalion, 162nd Infantry
 * 8 July 1947: Federally recognized as Medical Company, 162nd Infantry
 * 6 December 1947: Federally recognized as HHC, 186th Infantry
 * 8 December 1947: Federally recognized as Battery A, 218th Field Artillery Battalion
 * 23 October 1947: Federally recognized as Medical Company, 186th Infantry
 * 16 December 1947: Federally recognized as HH&S Company, 162nd Engineer Battalion (Combat)
 * 16 December 1947: Federally recognized as Medical Detachment, 162nd Engineer Battalion (Combat)
 * 12 March 1948: Federally recognized as HHB, 41st Division Artillery
 * 12 March 1948: Federally recognized as Service Battery, 218th Field Artillery Battalion
 * 25 May 1948: Federally recognized as HHB, 237th Antiaircraft Artillery Group
 * 10 August 1948: Federally recognized as Battery B, 218th Field Artillery Battalion
 * 10 August 1948: Federally recognized as Company A, 162nd Engineer Battalion (Combat)
 * 18 August 1948: Federally recognized as Company E, 162nd Infantry
 * 18 August 1948: Federally recognized as Company F, 162nd Infantry
 * 28 September 1948: Federally recognized as Medical Detachment, 41st Division Artillery
 * 8 March 1949: Federally recognized as HHB, 965th Field Artillery Battalion
 * 8 March 1949: Federally recognized as Service Battery, 965th Field Artillery Battalion
 * 8 March 1949: Federally recognized as Battery A, 965th Field Artillery Battalion
 * 8 March 1949: Federally recognized as Battery B, 965th Field Artillery Battalion
 * 8 March 1949: Federally recognized as Battery C, 965th Field Artillery Battalion
 * 31 January 1950: Federally recognized as HHB, 722nd Antiaircraft Artillery Gun Battalion
 * 31 January 1950: Federally recognized as Medical Detachment, 722nd Antiaircraft Artillery Gun Battalion
 * 25 February 1947: Federally recognized as Service Company, 162nd Infantry
 * 30 September 1947: Federally recognized as Company H, 162nd Infantry
 * 15 May 1959: ? redesignated Combat Support Company, 1st Battle Group, 186th Infantry
 * 1 January 1961: Combat Support Company, 1st BG, 186th Infantry redesignated Company D, 162nd Engineer Battalion

Portland Light Artillery Battery

 * 18 May 1925: Expanded into 218th Field Artillery Regiment
 * 4 February 1921: Oregon elements of 147th Field Artillery reorganized and federally recognized at Portland as Battery A, 148th Field Artillery Regiment
 * 23 May 1919: Demobilized at Camp Dodge, Iowa
 * 2 October 1917: Consolidated with elements of 4th Infantry, South Dakota National Guard to form 147th Field Artillery Regiment of the 41st Division
 * 5 August 1917: Drafted into federal service
 * 24 July 1917: Expanded to form Batteries A and B, Oregon Field Artillery
 * 18 July 1917: Assigned to 41st Division
 * 22 February 1917: Mustered out of federal service at Vancouver Barracks
 * 16 June 1916: Mustered into federal service at Clackamas for Mexican border duty
 * 16 October 1898: Redesignated as Battery A, Field Artillery, ONG
 * 15 October 1898: Mustered out of federal service at Vancouver Barracks
 * 1 July 1898: Mustered into federal service as Battery A, Oregon Volunteer Light Artillery
 * 23 May 1872: Redesignated Battery A, Oregon Field Artillery
 * 3 February 1866: Organized as the Portland Light Artillery Battery, Oregon Militia

The 1st Battalion of the 218th Field Artillery was organized at Portland on 5 April 1929, while the 2nd Battalion followed on 6 June 1930. The regiment was split on 14 February 1942, with the 1st Battalion redesignated as 2nd Battalion, 204th Field Artillery and leaving the division, while the 2nd Battalion reorganized as the 218th Field Artillery Battalion. The 218th FAB would serve with the 41st Infantry Division during World War II. The 2nd Battalion, 204th Field Artillery was redesignated as the 965th Field Artillery Battalion on 1 March 1943. Both battalions were reorganized in Portland postwar, and their lineage perpetuated by the 218th Artillery in 1959.

HHB, 218th Field Artillery Battalion

 * 1 March 1968: Redesignated Howitzer Battery, 3rd Squadron, 163rd Armored Cavalry (Squadron redesignated 3rd Squadron, 116th Armored Cavalry 1 May 1974)
 * 1 March 1963: Redesignated HHB, 1st Battalion, 218th Artillery
 * 15 May 1959: Redesignated HHB, 1st Howitzer Battalion, 218th Artillery
 * 10 April 1947: Reorganized and Federally recognized at Portland as HHB, 218th Field Artillery Battalion
 * 31 December 1945: Inactivated in Japan
 * 14 February 1942: Redesignated as HHB, 218th Field Artillery Battalion
 * c. 1941: Redesignated Headquarters Battery, 2nd Battalion, 218th Field Artillery
 * 16 September 1940: Inducted into federal service as Headquarters Battery, 3rd Battalion, 218th Field Artillery
 * 28 May 1937: Organized and federally recognized at Milwaukie as Headquarters Battery and Combat Train, 3rd Battalion, 218th Field Artillery

Redmond
The Redmond unit is currently Company B(-), 3rd Battalion, 116th Cavalry


 * Troop G, 82nd Cavalry with Detachment 1 at Woodburn, by 2004
 * 1 February 1972: Redesignated Company M, 3rd Squadron, 163rd Cavalry (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1968: Redesignated Detachment 1, Company M, 3rd Squadron, 163rd Cavalry
 * 1 March 1963: Redesignated as Company B, 2nd Battalion, 303rd Armor
 * 15 May 1959: Redesignated as Battery B, 1st Automatic Weapons Battalion, 249th Artillery
 * 10 January 1951: Organized and Federally recognized as Battery B, 722nd Antiaircraft Artillery Gun Battalion (battalion redesignated 722nd Antiaircraft Artillery Automatic Weapons Battalion, redesignated 722nd Antiaircraft Artillery Battalion 1 October 1953)

Roseburg
During the interwar period Company D was the battalion machine gun company of the 1st Battalion, 162nd Infantry. On 7 August 1959 the company was called up for security duty in response to the Roseburg blast caused by the explosion of a dynamite-loaded truck that leveled the city center. With the 1st Battalion, 186th Infantry, the company deployed to Djibouti as part of Task Force Guardian in 2019–2020.
 * 1979: Reorganized as Company C, 1st Battalion, 186th Infantry
 * 1 March 1968: Reorganized as Company C(-), 1st Battalion, 186th Infantry
 * 1 March 1963: Reorganized and redesignated Company B, 2nd Battalion, 162nd Infantry
 * 15 May 1959: Reorganized and redesignated Company D, 2nd Battle Group, 186th Infantry
 * 24 October 1947: Federally recognized as Company D, 186th Infantry
 * 8 March 1921: Federally recognized and soon redesignated Company D, 162nd Infantry
 * 25 July 1917: Drafted into federal service and absorbed by the 65th and 69th Artillery at Fort Stevens
 * 13 December 1911: Converted to 4th Company, CAC, ONG
 * 17 July 1907: Redesignated Company D, 4th Infantry Regiment, ONG
 * 11 July 1903: Redesignated Company D, 1st Separate Battalion, ONG
 * 3 May 1900: Redesignated Company E, 4th Infantry Regiment, ONG
 * 22 March 1900: Redesignated Separate Company E, ONG
 * 1898: Consolidated with Company D (Ashland) to form Company B, 2nd Oregon Volunteer Infantry Regiment
 * 15 June 1893: Organized as Company A, 2nd Infantry Regiment, ONG

Company B, 162nd Infantry

 * 15 May 1947: Federally recognized as Company B, 1st Battalion, 162nd Infantry Regiment
 * 6 March 1926: Redesignated Company B, 162nd Infantry Regiment
 * 1 April 1921: Redesignated Company F, 162nd Infantry Regiment
 * 5 May 1920: Redesignated Company M, 5th Infantry Regiment
 * 28 August 1919: Federally recognized as Company M, 3rd Infantry Regiment
 * 15 July 1903: Redesignated as Company M, 3rd Infantry Regiment
 * 3 May 1900: Redesignated as Company F, 4th Infantry Regiment
 * 17 June 1899: Reorganized as Company K, 3rd Infantry Regiment
 * 1898: Consolidated with Company I, 2nd Infantry Regiment (also of Salem) to form Company K, 2nd Oregon Volunteer Infantry Regiment
 * 27 June 1888: Organized as Company B, 2nd Infantry Regiment, Oregon National Guard

Company G, 162nd Infantry

 * 11 August 1948: Federally recognized as Company G, 2nd Battalion, 162nd Infantry Regiment, organized by splitting of Company B
 * Originally allocated to Portland, where prewar Company G was stationed, postwar, but due to lack of available personnel in Portland area shifted to Salem

HHB, 2nd Battalion, 249th Coast Artillery

 * 15 September 1945: Inactivated at Fort Canby
 * 18 October 1944: Redesignated HHD, 171st Coast Artillery Battalion (Harbor Defense)
 * 16 September 1940: Inducted into federal service
 * 15 April 1940: Headquarters, 2nd Battalion, 249th Coast Artillery location changed from Ashland, and Headquarters Battery, 2nd Battalion, 249th Coast Artillery organized and federally recognized

HQ, Coast Artillery Corps (Fixed Defenses), ONG

 * 22 March 1921: Reorganized and federally recognized 22 March 1921 at Salem
 * 20 November 1918: Demobilized in Coast Defenses of the Columbia
 * 5 August 1917: Drafted into federal service at Fort Stevens
 * 12 December 1911: Converted and redesignated HQ, CAC, ONG
 * 17 July 1907: Converted and redesignated as Headquarters, 4th Infantry, ONG
 * 3 May 1900: Reorganized at Eugene as HQ, 4th Regiment, Oregon Infantry
 * 7 August 1899: Mustered out of federal service at San Francisco
 * May 1898: Mustered into federal service as HQ, 2nd Oregon Volunteer Infantry
 * 20 May 1887: Organized at Portland as HQ, 2nd Regiment, Oregon Infantry

HQ, CAC, ONG controlled the 1st, 2nd, 3rd, and 4th Companies of the CAC, ONG, previously separate companies of coast artillery. The companies were redesignated as the 483rd through 486th Companies, CAC, ONG on 31 March 1922. The CAC, ONG was reorganized and redesignated as 1st Battalion, 249th Artillery, Coast Artillery Corps on 12 December 1923, and redesignated as 1st Battalion, 249th Artillery, CAC on 18 April 1924. The battalion was inducted into federal service on 16 September 1940 during World War II, and during the war reorganized as the 249th Coast Artillery Battalion (Harbor Defense) on 18 October 1944. Inactivated after the end of the war on 15 September 1945, the battalion was perpetuated in the reorganized Oregon National Guard by the 722nd Antiaircraft Artillery Gun Battalion, a battery of which was organized at Salem.

St. Helens
The St. Helens unit is currently Detachment 1, Company B, 1st Battalion, 186th Infantry Regiment, 41st Infantry Brigade Combat Team. The unit traces its existence back to 1923, with previous unit designations as follows:


 * 1 September 1992: Reorganized and redesignated Company D, 1st Battalion, 162nd Infantry, 41st Infantry Brigade
 * 7 December 1990: Redesignated Company C, 3rd Battalion, 186th Infantry (Anti-Armor) (Separate)
 * 1 December 1987: Reorganized and redesignated Company C, 1st Battalion, 249th Infantry (Anti-Armor) (Separate)
 * 30 September 1980: Converted, reorganized and redesignated Company C, 1st Battalion, 249th Infantry (TOW Light Anti-Tank) (Separate)
 * 1 April 1977: Converted, reorganized and redesignated Detachment 1, Company C, 141st Support Battalion, 41st infantry Brigade
 * 1 March 1975: Reorganized and redesignated Detachment 1, 162nd Engineer Company, 41st Infantry Brigade
 * 1 April 1973: Converted, reorganized and redesignated Detachment 2, 162nd Engineer Company, 41st Infantry Brigade
 * 1 March 1968: Reorganized and redesignated Detachment 1, Company A, 1st Battalion, 162nd Infantry, 41st Infantry Brigade
 * 1 March 1963: Reorganized under ROAD structure and redesignated Company C, 1st Battalion, 186th Infantry, 41st Infantry Division
 * 15 May 1959: Redesignated under Pentomic structure Company D, 1st Battle Group, 162nd Infantry, 41st Infantry Division
 * 5 June 1947: Reconstituted and federally recognized as Company K, 3rd Battalion, 186th Infantry Regiment, 41st Infantry Division
 * Ordered into Federal service 16 September 1940 and inactivated at Kure, Japan 31 December 1945
 * 5 April 1926: reorganized and redesignated as Company K, 3rd Battalion, 186th Infantry Regiment, 41st Infantry Division
 * 3 August 1923: organized as HHC, 3rd Battalion, 162nd Infantry Regiment

The unit fought in World War II with the 41st Infantry Division. State active duty includes 1970 four-day call-up in response to anti-war protests at the American Legion convention. With the 1st Battalion, 162nd Infantry, deployed to Iraq 2003–2004.

Silverton

 * 1 March 1968: Converted, reorganized and redesignated as Company B(-), 2nd Battalion, 162nd Infantry
 * 1 March 1963: Reorganized and redesignated as HHT, 1st Squadron, 82nd Cavalry
 * 15 May 1959: Converted to HHC, 1st Reconnaissance Squadron, 82nd Armor
 * 18 March 1947: Federally recognized as HHC, 1st Battalion, 162nd Infantry
 * 1 February 1937: Redesignated as Howitzer Company, 162nd Infantry
 * 7 October 1921: Redesignated Company I, 162nd Infantry
 * 5 May 1920: Redesignated Company I, 5th Infantry
 * 17 March 1920: Reorganized and federally recognized as Company I, 3rd Infantry, ONG
 * 30 June 1919: Federally recognized as 2nd Platoon, Company L, 3rd Infantry, ONG

The Dalles
The Dalles is currently home to Troop D, 1st Squadron, 82nd Cavalry.
 * 2016: Redesignated Troop D, 1st Squadron, 82nd Cavalry, 81st SBCT
 * ?: Redesignated Detachment 1, Company A, 3rd Battalion, 116th Cavalry
 * 1 October 1995: Reorganized and redesignated as Company C, 3rd Battalion, 116th Cavalry
 * 1 September 1989: Redesignated as Company E, 1st Battalion, 82nd Cavalry
 * 30 September 1980: Reorganized and redesignated as Troop K(-), 3rd Squadron, 116th Armored Cavalry Regiment
 * 1 May 1974: Redesignated as Detachment 1, Troop K, 3rd Squadron, 116th Armored Cavalry Regiment
 * 1 February 1972: Redesignated as Troop K(-), 3rd Squadron, 163rd Armored Cavalry (squadron redesignated 3rd Squadron, 116th Armored Cavalry Regiment 1 May 1974)
 * 1 March 1968: Redesignated as Detachment 1, Troop K, 3rd Squadron, 163rd Armored Cavalry
 * 1 March 1963: Redesignated as Company B, 162nd Engineer Battalion
 * 1 January 1961: Redesignated as Company E, 1st Battle Group, 186th Infantry
 * 9 August 1948: Reorganized and Federally recognized as Company B, 162nd Engineer Combat Battalion (battalion redesignated 162nd Engineer Battalion 1 August 1953)
 * 16 September 1940: Inducted into Federal service, inactivated 31 December 1945
 * 19 May 1924: Redesignated as Company H, 186th Infantry
 * 30 April 1924: Organized and Federally recognized 30 April 1924 as Company H, 162nd Infantry

Tillamook
With the relocation of the detachment, the Tillamook Armory was closed due to budget cuts and demolished in 1998.
 * 1990: Detachment 1, Company D, 1249th Engineer Battalion consolidated with the remainder of Company D at Camp Rilea
 * 1975: Redesignated as Detachment 1, Company D, 1249th Engineer Battalion
 * 1968: Redesignated as Detachment 1, 162nd Engineer Company
 * 1965: Redesignated as Detachment 1, HHC, 1st Battalion, 162nd Infantry
 * 1963: Converted, reorganized and redesignated as Detachment 1, HHC, 1st Battalion, 186th Infantry
 * 1959: Converted, reorganized and redesignated as Company E, 162nd Engineer Battalion
 * 10 March 1947: Federally recognized as Company M, 186th Infantry
 * 1 August 1922: Federally recognized as Company K, 162nd Infantry
 * 7 August 1916: Organized and federally recognized as 10th Company, CAC, ONG

Warrenton (Camp Rilea)
Unit stationed at Camp Clackamas, later renamed Camp Rilea
 * 15 February 2005: Reorganized and redesignated as 234th Engineer Company
 * 16 October 1999: Reorganized and redesignated as Detachment 1, Company B, 52nd Engineer Battalion
 * By 1983: Company D, 1249th Engineer Battalion
 * Inactivated 1963
 * 19 August 1948: Federally recognized as Company C, 162nd Engineer Battalion (Combat)

Woodburn

 * 1 September 2006: Reorganized as Troop B, 1st Squadron, 82nd Cavalry
 * 15 November 1965: Reorganized as Troop E, 82nd Cavalry, 41st Infantry Brigade (Selected Reserve Force)
 * 15 May 1959: Converted to Troop B, 1st Reconnaisance Squadron, 82nd Armor (squadron redesignated 1st Squadron, 82nd Cavalry 1 March 1963)
 * 3 July 1947: Federally recognized as Tank Company (Medium), 186th Infantry