April 24 - Fighting breaks out in the Dominican Republic as officers loyal to deposed President Juan Bosch lead a mutiny against the right wing junta running the country. US troops are later sent by President Lyndon B. Johnson for the stated purpose of protecting US citizens and preventing an alleged Communist takeover of the country.
July 24 - Vietnam War: Four F-4C Phantoms escorting a bombing raid at Kang Chi are the targets of antiaircraft missiles in the first such attack against American planes in the war. One is shot down and the other three sustain damage.
August 18 - Vietnam War: Operation Starlite begins as 5,500 United States Marines destroy a Viet Cong stronghold on the Van Tuong peninsula in Quang Ngai Province, in the first major American ground battle of the war. The Marines were tipped-off by a Viet Cong deserter who said that there was an attack planned against the US base at Chu Lai.
September 7 - Vietnam War: In a follow-up to August's Operation Starlight, United States Marines and South Vietnamese forces initiate Operation Pirahna on the Batangan Peninsula, 23 miles south of the Chu Lai Marine base.
November 6 - Freedom Flights begin: Cuba and the United States formally agree to start an airlift for Cubans who want to go to the United States (by 1971 250,000 Cubans take advantage of this program).
November 14 - Vietnam War: Battle of the Ia Drang begins - In the Ia Drang Valley of the Central Highlands in Vietnam, the first major engagement of the war between regular American and North Vietnamese forces begins.