Europeans used their better shipping and skills and military power (moslty their guns) to dominate trade to and from Africa. Europeans became the leading traders of Asian and African consumer goods. This was particularly striking in the early centuries of trade.
Answer: The European nation wanted to gain more wealth and power from these nations. They were able to gain gold through the plantation that were created by the European colonies. They were able to gather more people in their colony through slaves and indentured slaves.
By changing the traditional Mongol strategies and war policies to help keep his followers close and create a powerful military. He also took resources from his defeated enemies to help support and grow his nation.