Why did US government agreed to become involved in the Korean and Vietnam wars?

Answer 1

the USA decided that they wanted to stop the spread of communism which would trigger the domino theory. The domino theory was that if a single country fell to communism then the surrounding countries would fall as well. The USA had also signed the Truman Doctrine that would enable them to go into any country that was at threat of falling to communism and fight to prevent it. Thus the USA decided that Korea and Vietnam were at threat of falling to communism and intended to stop the spread of communism in Asia

Answer 2

Both the Korean and Vietnam wars occurred during the "cold war". This was the time after WWII that the U.S and the Soviet Union were having an arms race against each other. Another aspect of the cold war was that each country was trying to turn many other countries either communist (like Soviet Union) or democratic (like the U.S). Both the Vietnam and Korean wars were proxy wars. What this means is that they were wars where each country used a weaker country to fight "for" them. In both Vietnam and Korea , the Soviets had North Korea and North Vietnam and we had the south parts of both. Basically both wars were a way for the U.S and Russia to fight without actually declaring war against each other specifically. The U.S won the Korean War against Russia, and Russia won the Vietnam war against the U.S.