foreign policy Timeline By therealist Jan 1, 1867 French Invasion of Mexico Jan 1, 1889 Spanish-American War begins Jan 1, 1889 Trade wars in China1 Jan 1899 Jan 1, 1903 Panama Canal authorized 1 Jan 1903 Jan 1, 1917 U.S. enters World War I 1 Jan 1917 Jan 1, 1941 U,S. enters World War II1 Jan 1941 Jan 1, 1945 United Nations established 1 Jan 1945 Jan 1, 1948 Berlin Blockade 1 Jan 1948 Jan 1, 1948 Berlin Blockade 1 Jan 1948 Jan 1, 1965 U.S. commits to Vietnam War1 Jan 1965 Jan 1, 1972 SALT I pact1 Jan 1972 Jan 1, 1982 Cuban Missile Crisis1 Jan 1962 Jan 1, 2003 Operation Iragi Freedom1 Jan 2003