the league of Nations was an alliance with the mission to stop wars in deal with stuff diplomatically. the United States Senate wanted to go back to being isolationist.
The correct answer would be World War II. The largest amount of Americans who served in the armed forces is during the World War II. During the world war II, <span>a large standing army become officially established. Hope this is the answer that you are looking for. </span>
There were approximately 130,000 slaves that signed up and fought in the civil war that ended in 1865
hope this helps
