That was WW1.
WW2, the French surrendered......in the same railcar used for the Armistice in WW1... to the advancing Nazi's and were subjugated as the Vichy French until June 6th, 1944.
So, yeah....the US has saved the French butt.....twice and wound up taking over for them in VietNam after they surrendered.....again
Britain needed a “Brexit” in 1941. Germany was no threat to the British Empire. France was more their traditional rival than Germany was.