 Complete the following phrase:  The Polish First Army was integrated in the 1st Belorussian Front with which it entered Poland from Soviet territory in 1944. During the 1944 Warsaw Uprising it liberated the suburb of Praga, but otherwise sat out most of the battle, aside from a series of unsuccessful crossings of the Vistula in mid-September. It took part in battles for Bydgoszcz Bromberg, Kolobrzeg Kolberg, Gdańsk Danzig and Gdynia, losing about 17,500 killed in action over the course of the war. In AprilMay 1945 the 1st Army fought in the 