Today in Poland is Holiday of National Flag. It was in morning of 2nd May 1945, when Polish soldiers have fixed white-red Polish flags in Siegeshaule victory colum in Tiergarten in Berlin. It was immediately noticed by Soviets. It was “abuse to the Soviet Union” to fix a flag without permission of “Red Army authorities” and even before Red Army fixed red flag. So Polish soldiers were arrested and avoided being shoot only because German capitulation announcementt.
Read more about Polish Army involvement in Berlin siege and flag affair in Polish Army in Berlin page.
Units of Polish 1st Army are listed in Battle Order of the 1st Polish Army 1945 page
photo ADM via Foreign ministry license