St Louis.

The people who lost their empire next most quickly, were the people least willing to kill to maintain it (british).

The people who lost them next most quickly were those who tried to maintain them cheaply(french).

The people who lost them next most quickly were those who ran them poorly (russians, mongols).

The people who lost their next most quickly, were those who over extended them (roman).

The people who held their empires, were those that didn’t overextend them, didn’t run them poorly, didn’t run them cheaply, and who were willing to kill to maintain them (China, Egypt).

“Kill them until they stop coming. Then kill all those who you can find. Then kill all their relatives you can find. Then take their best things and burn the rest to the ground – erasing all trace of their existence.”