User:Ahench/4th Compsite Group Timeline

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Early Operation in the Philippines up to 1919 (before the 4th Group)

 * 12 March 1911: First plane arrives at the polo field of Fort William McKinley (Wright B - SC 7).
 * 12 January 1915: 4th and last plane crashes.
 * January 1916: 1st Co. 2nd Aero Squad arrives at Corregidor with 4 Martin S Seaplanes.
 * November 1918: 1st Co. 2nd Aero Squad demobilized

Early Operation in the Philippines from 1919 (before the 4th Group)

 * August 1919: 3rd Aero Squad arrives at Camp Stotsenburg, the Philippines with DH4s
 * December 1919: 2nd Aero Squad arrived at Ft. Mills, Corregidor, the Philippines with HS2Ls & DH4s

1920

 * 20 March 1920: 1st Observation Group activated at Fort Stotsenburg with:
 * 2nd Aero Squad
 * 3rd Aero Squad
 * 1 September 1922: 28th Aero Squad activated at Nichols Field
 * 2 December 1922: 1st Observation Group redesignated the 4th Composite Group
 * 25 January 1923: squads renamed:
 * 2nd Observation Squad
 * 3rd Pursuit Squad
 * 28th Bombardment Squad

=1940=
 * 31 May 1940: New General lobbies for modernization & reinf.
 * 31 May 1940: Status
 * 2nd - 10 O-46 & 5 ZO-19E: Clark Field
 * 3rd -- 28 P-26A: Nichols Field
 * 28th - 17 B-10: Clark Field


 * 14 December 1940: 17th Pursuit Squadron arrives at ...
 * 14 December 1940: 20th Pursuit Squadron arrives at ...

=1941=
 * 1 April 1941: Status
 * 2nd O-52: Clark Field
 * 3rd -- 22 P-26A: Nichols Field
 * 17th : Nichols Field
 * 20th : Nichols Field
 * 28th - 12 B-10: Clark Field


 * 1 May 1941: Philippine Department Air Force formed
 * 2nd O-52: Clark Field
 * 3rd -- 22 P-26A: Nichols Field
 * 17th : Nichols Field
 * 20th - 31 P40-B (being assembled): Nichols Field
 * 28th - 12 B-10 (with 18 B-18’s in crates): Clark Field
 * 56 P-35's divertered from sale to Sweden
 * 9 A-27's divertered from sale to Siam


 * 1 June 1941: 
 * 2nd O-52: Clark Field
 * 3rd -- 22 P-26A: Nichols Field
 * 17th : Nichols Field
 * 20th - 31 P40-B (being assembled): Nichols Field
 * 28th - 12 B-10 (with 18 B-18’s in crates): Clark Field


 * 1 July 1941: 
 * 2nd O-52: Clark Field
 * 3rd -- 20 P-26A: Clark Field
 * 17th - 39 P-35: Iba Field
 * 20th - 31 P-40B: Clark Field
 * 28th - 18 B-18: Clark Field


 * 1 August 1941: Far East Air Force formed
 * 2nd O-52: Clark Field
 * 3rd P-26A: Nichols Field
 * 17th P-35: Iba Field
 * 20th P-40B: Clark Field
 * 28th B-18: Clark Field


 * 50 P-40E shipped
 * 28 P-40B shipped


 * 1 September 1941: 
 * 2nd O-52: Clark Field
 * 3rd P-26A: Iba Field
 * 17th P-35:
 * 20th P-40B: Clark Field
 * 28th B-18: Clark Field
 * 14th B-17D: Clark Field


 * 1 October 1941: 
 * 2nd O-52: Clark Field
 * 3rd P-26A: Iba Field
 * 17th P-35:
 * 20th P-40B: Clark Field
 * 28th B-18: Clark Field
 * 14th B-17D: Clark Field1 October 1941


 * 1 November 1941: 
 * 2nd O-52: Clark Field
 * 3rd P-40E: Iba Field
 * 17th P-40E: Nichols Field
 * 20th P-40B: Clark Field
 * 21st P-40E: Lubao Field
 * 34th P-35: Del Carmen Field
 * 28th B-18: Clark Field
 * 14th B-17D: Clark Field

The numbers below in italicized brackets indicate the number of aircraft in commission on 8 December. If no figure is listed, the number of usable aircraft is unknown. There were 60 additional aircraft in the Philippine Army Air Corps, including one Keystone ZB-3A bomber. 42 were Stearman 76DC trainers of varying serviceability and utility.
 * 8 December 1941
 * B-17C/D: 35 (32)
 * P-40B/E: 91 (73)
 * A-27: 8 (1)
 * P-35A: (26)
 * B-18A: 18 (15, all as trainer-transports, with 2 at Del Monte)
 * B-10B: 3 (1 PAAC)
 * P-26/P-26A: 12 (12 PAAC)
 * O-52: 11
 * Other: 46

Order of battle - 8 December 1941
SOURCES: AAF Historical Study No.34, Army Air Forces in the War Against Japan, 1941–1942 and Bartsch, 8 December Appendix C (35th Pursuit Group headquarters never arrived in the Philippines and is not listed for that reason.)
 * 5th Bomber Command
 * 19th Bomb Group (Heavy) (Headquarters, Clark Field, collectively, 4 B-17C, 15 B-17D, 10 B-18) The B-17s were distributed eight to a squadron, with three attached to the group headquarters squadron. Four of the B-18s were assigned to Headquarters Squadron, and the others to the 28th BS.
 * 14th Bomb Squadron (Del Monte Field|Del Monte Field No. 1, 6 December; 1 B-17C, 7 B-17D)
 * 28th Bomb Squadron (Clark Field)
 * 30th Bomb Squadron (Clark Field)
 * 93rd Bomb Squadron (Del Monte Field No. 1, 6 December; 1 B-17C, 7 B-17D)
 * 5th Air Base Group (Del Monte No. 1, 2 B-18)
 * 27th Bomb Group (Light) (without assigned aircraft, 3 B-18 attached for training)
 * 16th Bomb Squadron (Fort McKinley)
 * 17th Bomb Squadron (San Fernando Auxiliary Field)
 * 91st Bomb Squadron (San Marcelino Auxiliary Field)
 * 10th Bombardment Squadron (Light), Philippine Army Air Corps (Maniquis Field)
 * 5th Interceptor Command
 * 24th Pursuit Group (Headquarters, Clark Field)
 * Headquarters Squadron (Clark Field)
 * 3rd Pursuit Squadron (Iba, Zambales)
 * 17th Pursuit Squadron (Nichols Field)
 * 20th Pursuit Squadron (Clark Field)
 * 21st Pursuit Squadron (attached, Nichols Field)
 * 34th Pursuit Squadron (attached, Del Carmen Field)
 * 6th Pursuit Squadron, Philippine Army Air Corps (Zablon Field)
 * 2nd Observation Squadron (Nichols Field, 2 O-46A, 3 O-49, 11 O-52)


 * 3rd week of December 1941: 
 * 14 B-17s
 * 16 P-40s
 * 4 P-35s

4th Composite Group 1920–1941