After World War 2, many African countries gained independence from European colonial rule. This included Congo gaining independence from Belgium in 1960 and Ghana becoming the first sub-Saharan country to gain independence in 1957. However, newly independent countries faced significant challenges, such as civil wars in Congo and Nigeria. Apartheid existed in South Africa until the early 1990s, denying equal rights to blacks. Genocide in Rwanda in 1994 and HIV/AIDS across sub-Saharan Africa have also had devastating impacts in recent decades. Pan-African movements have sought to promote greater unity and cooperation across the continent.