The Angolan War of Independence, known as the Armed Struggle of National Liberation in Angola, was a war of independence fought by the Angolan nationalist forces of the MPLA, UNITA and FNLA against Portugal. It began as an uprising by Angolans against the Portuguese imposition of forced cultivation of only cotton as a commodity crop. As the resistance spread against colonial authorities, multiple factions developed that struggled for control of Portugal's overseas province of Angola. There were three nationalist movements and also a separatist movement.