The most prized display is that dedicated to the Great Patriotic War, which includes the Victory Banner as well as all of the front banners and the captured Nazi ones that were used during the Victory Parade in 1945. The Great Patriotic War differs from World War II in that it began on 22 June 1941 with the German invasion of the Soviet Union. World War II (in Europe), started on 1 September 1939 with the co-ordinated attacks of Germany and the Soviet Union on Poland.