They were on a slave catching expedition.
Answer:
Rome became the most powerful state in the world by the first century BCE through a combination of military power, political flexibility, economic expansion, and more than a bit of good luck. This expansion changed the Mediterranean world and also changed Rome itself.
Foreign countries were given total control over trade in China
Answer:
balance the sovereignty of the states with an effective national government
Columbus though he had landed in India, he was wanting to trade for spices I believe