When and why was nelson mandela sent to prison?

Nelson Mandela was sentenced to prison in 1962 after being arrested for leading a sabotage campaign against the apartheid regime in South Africa. He was subsequently convicted in 1964 on charges of conspiracy to overthrow the government and was sentenced to life imprisonment. Mandela's imprisonment lasted 27 years, during which he became a symbol of the struggle against apartheid and a global icon for human rights. His release in 1990 marked a pivotal moment in South Africa's transition to democracy.