The LWP Polish formation fought along the Allied side in the USSR, after the Anders Army had left the USSR. The LWP Polish forces soon grew beyond the 1st Division into two major commands - the Polish First Army (Berling's) and the Polish Second Army (commanded by Karol Świerczewski). The most significant tank formation in the initial period was the 1st Warsaw Armoured Brigade equipped with T-34 tanks, that first fought in the battle of Studzianki. The Polish First Army participated in the Vistula–Oder Offensive and the Battle of Kolberg (1945) before participating in its final offensive with the Battle of Berlin, and later became the armed force of the Polish communist government of Poland after the German surrender. The Polish Second Army entered combat in 1945 during the final Soviet offensive into Germany. In the last month of the war the 1st Polish Armoured Corps equipped with 195 T-34-85 tanks fought in eastern Germany during the battle of Bautzen.