12 Throughout the Cold War, most United
ld War, most United States foreign policy was based on the belief that the
United States had the responsibility to -
F prevent the spread of communism.
G provide economic aid to the nations of the Warsaw Pact.
H support government overthrows.
avoid all foreign entanglements.

F Prevent the Spread of Communism

Explanation:

During the Cold War, The United States feared the spread of communism, this was because the Soviet Union was the US' main enemy.  The Korean and Vietnam war were both fought on the pretense of eliminating communism and many of the clandestine operations performed by the US were to spread democracy and stop the red menace.

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.

c. it required that townships set aside land for public schools.