The definition of Imperialism is to extend a country's power and influence through diplomacy and military force.
This was motivated by four important factors. (Can be five too.)
They wanted political, economic, cultural, and geographic power.
This was also important for a desire for money, to expand and control foreign trade. They wanted to get raw materials and cheap labor.
They wanted to claim territory to help protect their empire. This was mainly an event to gain power, materials, and money.
