SAT Subject US History Practice Question 767: Answer and Explanation
28. The presidency of Lyndon Johnson was dominated by issues involving Vietnam after he
A. coined the phrase domino theory and sent advisers to South Vietnam.
B. pledged to support French forces in Vietnam.
C. signed the Geneva Accords.
D. Vietnamized the war.
E. proposed the Tonkin Gulf Resolution.
Correct Answer: E
The Tonkin Gulf Resolution gave the president the unrestricted right to defend American interests in Vietnam. Johnson escalated the war rapidly after his election in 1964. The war dominated his administration, influencing his decision not to run for a second full term in 1968. The term domino theory was coined by President Eisenhower, the first president to send troops-which he called "advisers" (A). Harry Truman sent money to aid the French (B) but no troops. The United States never signed the Geneva Accords of 1954 (C), which split Vietnam into North and South Vietnam and called for elections. It was President Nixon's policy to "Vietnamize" the war (D), which was a strategy to increase the bombing and turn over the fighting on the ground to the South Vietnamese.