Fall of the Berlin Wall was in 1989, Fall of the Soviet Union was in 1991
Might want to accept simply "Columbus"
Maybe accept PRC, or just china
October Revolution should be accepted for Bolshevik or Russian Revolution
Atomic Bomb, Abomb, Hiroshima, Nagasaki should be accepted for 1945
Fall of the Berlin Wall was in 1989, Fall of the Soviet Union was in 1991
Might want to accept simply "Columbus"
Maybe accept PRC, or just china
October Revolution should be accepted for Bolshevik or Russian Revolution
Atomic Bomb, Abomb, Hiroshima, Nagasaki should be accepted for 1945