Reagan and the World By ma_amaruna Period: Jan 19, 1968 to Jan 19, 1989 Reagan and the World Jul 19, 1969 Going to the Moon American astronauts landed on the moon Apr 19, 1970 Cambodia U.S forces invade cambodia. May 19, 1970 Kent State University Ohio national guardsmen killed 4 students at kent stae university. Jul 19, 1971 26th amendment States ratify the 26th amendment to the constitution giving 18 year olds the right to vote.