The terrorist and the communist so the answer is yes.
The enemy of the French, the Viet Minh, were communist backed.
The US was on the SOUTH Vietnamese side. The enemy was the NORTH Vietnamese...two separate countries. The Southerners were non-communist; the Northerners were communists.
The peninsula of Korea allowed easy control (of Communist reinforcements) for the US Navy; the enemy was easily isolated by the US Navy.
Costa Rica is a democratic nonmilitary country, with an apparently impressive stability and a strong economy, and good ties to the western world. It is almost as far as you could get from "a haven for communist insurgencies".
Same people. All were communist.
The US gave material aid the French during their First Indochina War 1946-1954. Because the their enemy was COMMUNIST supported. The US was too busy fighting in Korea (1950-1953) to supply further assistance.
The US has never been under Communist Rule. As a result, the question is unanswerable.
The Warsaw Pact, made up of the Soviet Union and the communist parts of Eastern Europe.
There was actually little the US could do about the communist takeover in Czechoslovakia. Diplomatic relations remained and the relationship was cordial for the length of the communist regime.
When the US withdrew from Vietnam in 1975, it did nothing to repair Vietnam, on the principle that Vietnam was a member of the Soviet bloc, and their communist allies, the USSR and China, were the ones who were responsible for any needed international assistance to Vietnam. It is much easier, from a political viewpoint, for the US to help a defeated enemy, as it did with West Germany and Japan and Italy, following WW II, than it is to help a victorious enemy. After fighting so desperately to prevent communist North Vietnam from taking over South Vietnam, the US was not then going to help communist Vietnam to rebuild after the war. The communists won the war, they therefore could rebuild themselves. Since the end of the Cold War in 1990, relations with Vietnam have improved, but are still not very close. The US does not like to lose.
It's not a ally or a enemy its a NATO.
Because theyb both had a common enemy in the Soviet Union, the term antio communist pact is pretty self explanatory i would have thought.