11) When did the Vietnam War end?
12) What countries made up the Axis powers in World War II?
13) What was the name of the strategy during the Vietnam War?
14) What year did the withdraw its forces from Vietnam?
15) What two countries provided military support to South Vietnam during the war?
16) When did the Vietnam War officially start?
17) What was the name of the system of buffer zones in Vietnam?
18) How did the US justify their involvement in the war?
19) What was the name of the operation that marked the beginning of large-scale US involvement in 1965?
20) What was Operation Linebacker 1 also known as?