We haven’t. Rand Paul’s point.
Although I could answer ...
War of Independence
War of 1812
Mexican War
Civil War
WWI
WWII
I am all for fighting for OUR Constitution, etc. but somehow the war to impose liberal democracy at gun point just isn't a winner - I wonder why that is? Oh, because for liberal democracy to work a lot of people have to want it? Is that it? What an insight. Sheesh! /s/