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...South Vietnam before Gulf of Tonkin|advisory buildup]] (1962-1964), the [[Gulf of Tonkin incident]] in 1964, the U.S. ground combat involvement (1964-1972), [[South Vietnam' :::::*[[Gulf of Tonkin incident]] in 1964

U.S. military involvement began to increase in 1964 and 1965, the Gulf of Tonkin incident indicated a new level of intensity, when North Vietnam explicitly became pa Navy LT Everett Alvarez was shot down during a raid following the Gulf of Tonkin incident, and became the first American prisoner of war (POW) in North Vietnamese ha

...1961-1964, characterized by direction-finding and COMSEC, ending with the Gulf of Tonkin Incident. This partially overlaps the period of "SIGINT and the Attempted Coups agai ...1961-1964, characterized by direction-finding and COMSEC, ending with the Gulf of Tonkin Incident. This partially overlaps the period of "SIGINT and the Attempted Coups agai

...isors in Vietnam. Johnson expanded their numbers and roles following the [[Gulf of Tonkin Incident]] (less than three weeks after the Republican Convention of 1964, which had

...ng office, and the first overt U.S. combat role in Vietnam following the [[Gulf of Tonkin incident]]. See [[SIGINT from 1945 to 1989#Early days: American and Operational Pers

...at support, perhaps centered around the Battle of Ap Bac, up either to the Gulf of Tonkin Incident or perhaps the beginning of US-supported covert action against the North (e *[[Gulf of Tonkin incident]] (in progress)