After bringing into light the Katyn massacre and breaking off the diplomatic relations with Poland (April 1943), Stalin decided to organize Polish armed forces fighting at side of the Red Army. These troops emerged without the approval of the legal authorities of Poland, most of the commanding personnel were Soviet officers, the political officers recruited from the Polish communists but ordinary soldiers were Poles deported in the years 1939-1941 to the interior of the Soviet Union, and from the spring 1944, also the inhabitants of the Polish Kresy Wschodnie (Eastern Borderlands).