Thus, the 1st (Soviet) Polish Infantry Division, stationed along the Vistula received orders to prepare to storm Praga. This Division was one of three in the First Polish Army., commanded by the Polish General Zygmunt Berling. They had been formed from Polish ex-prisoners of war, held by the Red Army since the Autumn Campaign of 1939, ad from recent conscripts from Eastern Poland. Major portions of these divisions were, therefore, neither well-trained nor well-armed. But, for the attack on Praga they received considerable support from Soviet tanks, artillery and engineers. Accompanied by two neighboring Soviet Divisions, the Poles (now known as the "Polish Assault Division") began the battle for Praga. Sections of two German divisions opposed them. By evening the Poles had managed to fight their way deep into Praga. But the battle was by no means over.