Shown here is the Senate roll call tally sheet for the "Tonkin Gulf Resolution" on August 7, 1964, which gave President Lyndon Johnson authority to increase U.S. involvement in the war between North and South Vietnam. On August 4, 1964, President Lyndon Johnson announced that two days earlier, U.S. ships in the Gulf of Tonkin had been attacked by the North Vietnamese. Johnson dispatched U.S. planes against the attackers and asked Congress to pass a resolution to support his actions. The joint resolution "to promote the maintenance of international peace and security in southeast Asia" passed on August 7, with only two Senators dissenting, and became the subject of great political controversy in the course of the undeclared war that followed.
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