Answer:
Read the Answer I wrote
Step-by-step explanation:
1: America was afraid of the domino effect were all of asia could fall under communism so they had to contain the spread of communism
2: In my opinion yes because Communism could have easily spread to India, Iran, Iraq, and much further had south east asia fallen under Communism
3: I think this war will end as this time the U.S has a tactic, they fight like they fought in the old wars, For example, in desert storm they fought like Vietnam, in Vietnam they fought like the Korean war, in the Korean war, they fought like WW2.