 Complete the following phrase:  Two of the most significant military parades on Red Square were 1941 October Revolution Parade, when the city was besieged by Germans and troops were leaving Red Square straight to the front lines, and the Victory Parade in 1945, when the banners of defeated Nazi armies were thrown at the foot of Lenins Mausoleum. The Soviet Union held many parades in Red Square for May Day until 1969, Victory Day, and October Revolution Day, which consisted of propaganda, flags, labor demonstration, marching troops, and showing off of tanks and missiles. Individual parades have been held on Defender of the Fatherland Day 23 February 1925, the Day of Tankmen 8 September 1946, and the 