If the United States came together initially in many parts due to military conquest, then yes, I would say that's imperialist. Just because they share an ethni

If the United States came together initially in many parts due to military conquest, then yes, I would say that's imperialist. Just because they share an ethnicity you can't claim that the hundreds of years of expansion of the Zhou, which involved nonzero amounts of military conquest, or the Warring States period weren't imperialistic. Even outside of the unification attempts, there was plenty of conquest of tribes that had never been a part of any state. In recent history, the PLC invaded Tibet in 1950, 37 years after Tibet gained independent via treaty.