A 1974 military coup in Lisbon abolished the authoritarian regime established by António de Oliveira Salazar that had prevailed in Portugal for decades. The new government decided immediately to grant all Portuguese colonies the independence for which nationalist guerilla movements had been striving. In Angola, the decolonization process took the form of a violent conflict between the different guerilla movements and their allies. In 1975 the Treaty of Alvor between Portugal and National Liberation Front of Angola (FNLA), People's Movement for the Liberation of Angola (MPLA) and National Union for the Total Independence of Angola (UNITA) reconfirmed Cabinda's status as part of Angola. The treaty was rejected by the Front for the Liberation of the Enclave of Cabinda and other local political organizations which advocated of separate independence. Since then, Cabinda has been, on the one hand, a normal Angolan province, but on the other hand, there has been persistent political protest against this status; the "Kabinda Free State" says the exclave was a Portuguese protectorate until Angola invaded in 1974. They also say they control 85% of Kabinda territory and invite proposals for joint ventures. A number of guerrilla actions have also occurred in Cabinda.