Good point. I think it’s easy for people to forget that ancient empires also count as imperialists. The Roman’s were probably better at expansion than most other imperialist empires of the more modern times, because the Roman’s were all about assimilation and bringing stability to the regions they conquered (which is very arguable of course, but still). Whereas more modern imperial regimes tended to be parasites that only ever took from the countries they preyed upon.