Suwałki Cavalry Brigade

Suwalska Cavalry Brigade (Polish: Suwalska Brygada Kawalerii) was a cavalry unit of the Polish Armed Forces of the Second Polish Republic in the interbellum period. It was created on April 1, 1937, out of the 4th Independent Cavalry Brigade. Its headquarters were stationed in Suwałki and the brigade consisted of these units:
 * 1st Lancers Regiment, “Krechowieckich.”, stationed in Augustów.
 * 2nd Grochów Uhlan Regiment, stationed in Suwałki
 * 3rd Mazovian Light Cavalry Regiment, “Mazowieckich.”, under the command of Col. Jan Kozietulski, stationed in Suwałki.
 * 4th Mounted Artillery Regiment, stationed in Suwałki
 * 11th Squadron of Pioneers, stationed in Augustów
 * 11th Squadron of Communications, stationed in Suwałki

History
In May 1921, 7th Cavalry Brigade, which had fought in the Polish–Soviet War, was renamed into 4th Cavalry Brigade, with three regiments: 3rd Regiment of Mazovian Chevau-légers, 1st Krechowce Uhlan Regiment and 2nd Grochów Uhlan Regiment, as well as 4th Horse Artillery. In December 1921, headquarters of 4th Brigade were moved from Grodno to Suwałki. In February 1929, 4th Cavalry Brigade was renamed into Cavalry Brigade Suwałki, and on April 1, 1937, it was renamed again, into Suwalska Cavalry Brigade.

1939 German Invasion of Poland
During the Invasion of Poland, Suwalska Cavalry Brigade, under General Zygmunt Podhorski, belonged to Independent Operational Group Narew, and its task was to protect the approaches to Grodno and cover northern flank of the Narew Group. It concentrated all its subunits by September 2, 1939, and manned its positions along the border with East Prussia. On the same day, the Wehrmacht unsuccessfully attacked Bakałarzewo.

In the night of September 3/4, two squadrons of 3rd Regiment of Mazovian Chevau-légers carried out a successful raid over several villages of East Prussia. Soon afterwards, Polish headquarters ordered the Brigade to move southwards, to forests between Putusk and Ostrów Mazowiecka. Polish planners wanted to attack German forces which marched along western bank of the Narew. In the night of September 4/5, the Brigade began its march from the area of Suwałki to Zambrów, via Knyszyn and Tykocin. On September 7, it reached the village of Jabłoń Kościelna, and on September 9–10, Colonel Kazimierz Plisowski temporarily commanded the Brigade. At the same time, it was engaged in heavy fighting with German Panzer Division Kempf.

On September 9 in the morning, the Brigade was ordered to attack German positions in the villages of Piski and Ksiezopole. By afternoon, both villages were captured, with numerous prisoners of war. In the evening the Brigade retreated to forests around Koskowo, but without 2nd Grochów Uhlans, which was ordered to protect the wing of Polish 18th Infantry Division, and on September 10 was engaged in heavy fighting near Rutki.

On 10 Sept., the brigade, under the command of Gen. Zygmunt Podhorski, was pinned down by the 10th Panzer Division (Wehrmacht) south of the Biebrza River.

On September 11 the Brigade retreated south of Zambrów, and on the next day, it merged with remnants of Podlaska Cavalry Brigade, creating Operational Group of General Podhorski.

In the night of September 13/14 near Olszewo, the Brigade was involved in heavy fighting, which caused its partial destruction. In revenge for the losses suffered in the battle, German troops of the 206th Infantry Division perpetrated a massacre of 30 Polish POWs and 23 civilians in Olszewo on 14 September 1939 (see Nazi crimes against the Polish nation). Survivors fled to Białowieża Forest, where by September 20, Plis Cavalry Brigade (named after Colonel Kazimierz Plisowski) was created.