US as World's Policeman By Primary Source Period: 1898 to 1935 Interventions in Latin America US launched minor interventions in Panama, Haiti, DR, Nicaragua to safeguard against local civivl wars 1914 Wilson's intervention in Mexico Period: 1945 to 2019 Post-1945 Military Bases 1949 US joins NATO 1950 UN containment in Korea Period: 1961 to 1973 US involvement in Vietnam War 1990 Persian Gulf War 2001 War in Afghanistan 2003 Iraq Invasion