The document outlines major events from 1917 to 1991 related to the Cold War and rise and fall of communism. It begins with the Russian Revolution and Lenin becoming leader of Russia in 1917. Key events include the formation of the USSR in 1922, World War II, the start of the Cold War in 1945, the Berlin Blockade and establishment of NATO in 1949. It concludes with the fall of the Berlin Wall in 1989 and dissolution of the Soviet Union in 1991, marking the official end of the Cold War.