Won what? Most of Europe was still Medievel till Truman decided to bring them to the 20th Century. And short of resources from afar to keep stealing, the few Empires crumbled.
Rome was never able to conquer Iran - the only nation it couldn't. 2nd oldest country in the world. It's still here. The Roman Empire is not. Britain is rupturing at such a clip, in a couple of decades what's left of its motto will be, "At least we're still bigger than the Isle of Wight"
Europe depends on Uncle Sam's teat and us to change their tear soaked soiled diapers. Yeah, frame and tack that one above the mantle.