SAT Subject US History Practice Question 88: Answer and Explanation
1. Which of the following prompted the first use of UN military forces?
A. Tension between the Soviet Union and the United States
B. The nuclear arms race between the Soviet Union and the United States
C. The North Korean invasion of South Korea
D. The international agreement to put Nazi officials on trial for their crimes
E. Anticommunist hysteria in the United States
Correct Answer: C
When North Korea invaded South Korea in 1950, the UN called for a cease-fire and then sent UN troops (mostly U.S. military forces) to defend South Korea.