Events in History By AFalcon Period: Jul 28, 1914 to Nov 11, 1918 WWI The League of Nations formed at the end of the war in hopes to prevent something similar from happening. Period: Jan 11, 1929 to Jan 11, 1932 Great Depression Dec 7, 1941 Pearl Harbor The surprise attack on Pearl Harbor by the Japanese. Jul 20, 1969 First man on the moon (Neil Armstrong-USA) Apollo 11 was the spaceflight that took the first humans to the moon.