Watching Trump march through Poland with his imported applauders and his white nationalist message reminded me that empires don't take long to crumble once they start falling apart around the edges. I thought I'd have a look at some classic empires and see how we compare. I'm figuring that we didn't really count as an empire until about 1846, when we started grabbing stuff from Mexico.
Well, we beat the Mongols and Aztecs, so that's something. Just a tiny droplet in the shifting kitty litter of time, though, really.