Independence Movements in Africa

Between 1957 and 1993 nearly 50 African states achieved independence from colonial rule. The first sparks of resistance to foreign control took shape much earlier, though, in some cases hundreds of years earlier. Independence movements developed throughout Africa in the mid-1900s. Although they followed different paths, they shared a common beginning: resistance to domination by foreign powers. Unfortunately, once in control, many of these independence movements imposed their own form of domination. As a result, modern Africa continues to wrestle with many of the same political problems that motivated the independence movements of the past.
Describe the common trigger for the indepedence movements in Africa.