Why did america join the korean war?

Question: Why did america join the korean war!?
Best Answer - Chosen by Asker:

To prevent the Communist North Korea and China from taking over control of the South!.Www@QuestionHome@Com

cos north korea was comunist america hate comunists therefore america feel they need to involve themselves in other peoples buisnessWww@QuestionHome@Com

The USA was part of the UN peace keeping force!.Www@QuestionHome@Com

blame the un!.Www@QuestionHome@Com