Here are your matches:
1. Berlin Wall
- This was a symbol of the Cold War that separated the East and the West; communist and non-communist part of a German city.
2. NATO
- This is an international organization created by the U.S. and its allies in 1949 to prevent attacks by the Soviet Union.
3. Domino Theory
- This is the belief that if one country fell to communism, other countries around it were likely to fall to communism as well.
4. 38th Parallel
- This line of latitude separates communist North Korea and the U.S. backed Republic of Korea.
5. United Nations
- This is an international organization created following World War II to provide a way to negotiate disputes.
6. Truman Doctrine
- This said that the United States would aid any nation in resisting the growing threat of communism and became a guide for American foreign policy during the Cold War.
7. SALT ( = Strategic Arms Limitation Talks)
- This was the acronym for political talks between the United States and the USSR regarding nuclear weapons.
8. Berlin Airlift
- This was the delivery of supplies in a German city to circumvent the Soviet Blockade
The answer is Tet Offensive. It was one of the largest military campaigns of the Vietnam war.
I do believe the answer to this question is both Egypt and Mesopotamia.