That would be the American Revolution.
The US military draft began in the US Civil War (1861-1865).
"Rainbow 5" was the military plan to go to war with England and France against Germany
The first US military stand against communism; with the successful effect that demonstrated that not only would the US use force, but the US could succeed in stopping them.
the first US Military personnel was killed
The anti-war movement lowered the morale of the US military and it's allies.
American military and economic preparedness for war
Reluctance to participate in other military adventures over-seas. Until 1983, America's first over-seas military campaign; against Grenada (Operation Urgent Fury).
The first war that involved the US Army was the war of 1812. The Continental Army fought against Britain in the Revolutionary War.
He shows his confidence in Americans citizens' ability to contribute to the war effort.
Island Hopping
President Carter and Reagan.
American civil war