What were three effects of European imperialism on Africa?

Economic and strategic status of the"colonizing"government, who economically speaking, forcibly acquired land, labour, capital and other resources from its conquest and strategically speaking, gains an involuntarily"ally".

Social Disarray:

When Europe colonized Africa, the African continent was forced to recognize invisible cultural boundaries that it had not been exposed to before. European settlers moved in to various parts of the country and created a dominant minority. Sometimes people within tribes would attempt to make it seem as if they had a legitimate reason to rule or be in a position of power when they did not. This caused cultural disarray. Also, different tribes and members of different countries were forced together when the Europeans carved up Africa using these invisible boundaries. Again, this caused social disarray.

Loss of tribal identity:

Many tribes were forced to learn just enough European schooling and culture to be 'civilized' in the eyes of the Europeans. In doing this, many African tribes lost their tribal identity ie their customs, belief systems, etc because the children of the tribe grew up knowing only what they had learned from the Europeans.

Slavery:

In some parts of Africa, Europeans would turn local Africans into slaves to work on plantation like pieces of land. Many tribal leaders became corrupt and would sell their own people into slavery to protect themselves. Others would sign treaties without understanding what they were giving up (their freedom).