There are several groups of such warriors, but the most famous are the Masai Mara of Kenya.
bediouns bediouns bediouns
The Indian ocean lies to the east of Africa,
The "horn of Africa" got its name form the horn-shaped figure at the east of Africa. The east coast of Africa is shaped like a horned animal, like a rhino.
If you are talking about nomadic Muslims in the desert, they are called bedouins. (pronounced bedu-wins) I think they are called kurds
The term East Africa is a proper (compound) noun, the name of a specific place.
The Indian Ocean.
Kenya
nigeria
china
Tanzania
Portuguese East Africa
Djibouti