Polish 1st Armoured Brigade of the defenders of Westerplatte (Polish: 1 Brygada Pancerna im. Bohaterów Westerplatte) or Polish 1st Warsaw Armoured Brigade (Polish: 1 Warszawska Brygada Pancerna) was a military unit in the Ludowe Wojsko Polskie. It was formed on August 19, 1943, from a regiment (pułk) of the same name. The unit fought at the Battle of Lenino (September 1943) and at the Battle of Studzianki during the Lublin-Brest Offensive (Magnuszew bridegheads in August 1944). From mid-August it was subordinate to the Polish First Army. Later the unit fought in the East Pomeranian Offensive.