You’d have to drop Korea from your list for purely legal reasons (Congress never formally declared war there), and I’d make the case that everything after 1900 was at least morally questionable simply because there was really no “national defense” involved in any of those military campaigns.
I think World War II would count.
We were attacked by Japan and then Hitler declared war on in 3 days later. Most people on Dec 6, 1941 were against war but that changed when we were attacked.
We did not start it. But we did finish it.