Suwałki Cavalry Brigade

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.

On September 9 in the morning, the Brigade was ordered to attack German positions in the villages of Piski and Ksiezopole.

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.

[4] Survivors fled to Białowieża Forest, where by September 20, Plis Cavalry Brigade (named after Colonel Kazimierz Plisowski) was created.