Nelson Mandela was born in 1918 in South Africa to a chief of the Tembu Tribe. He received his primary education and began studying for his bachelor's degree, but left university after being accused of participating in a student strike. Mandela joined the African National Congress in 1943 to advocate for the rights of the black majority in South Africa. He became president of the ANC's military wing in 1961 and was arrested in 1962, spending most of the next 27 years in prison for his anti-apartheid activities. After his release in 1990, Mandela continued advocating for an end to apartheid and was elected president of South Africa in 1994, becoming the country's first black head of state.