Govt. By daypelep Jul 28, 1914 World War 1 (1914 - 1918) A war to end all wars... Jun 28, 1919 Treaty of Versailles Aug 18, 1920 Women gained a right to vote Nov 23, 1920 Mass Media... Oct 29, 1929 The Great Depression 1959 Hawai'i and Alaska became the 50th and 49th state Dec 7, 1959 Pearl Harbor Japan bombing Pearl Harbor Nov 8, 1960 John F. Kennedy elected as president Jul 1, 1968 U.S. signs Nuclear Non-Proliferation Apr 30, 1970 U.S. President Richard Nixon orders an invasion of Cambodia Making the war even bigger