They put them in ghettos and tried to starve them at first, before the Final Solution
Because The Maurya Empire in India used a combination of political sabotage, religious conversion, and military conquest to expand its rule. The Romans, although a militaristic society, did not generally set out to conquer territory. But, they did get involved in many wars.
I hope that helps.
B. Puerto Rico.
Don't think Cuba
Silk road of course or it can be silk