Question Answered step-by-step The Vietnam War was initiated out of the policies of the post-warperiod and ideas set forth in the Truman Doctrine. -How was the invasion of Vietnam in the 1960s a direct response to the ideal of containment? -What were the overall effects of the Vietnam war at home and abroad? What did this change about the position of the US in the world, what did it change about the relationship of people in the US to its government (this includes all the way into 1975)?History World History HIST G175