The MPLA and UNITA had different roots in Angolan society and mutually incompatible leaderships, despite their shared aim of ending colonial rule. A third movement, the National Front for the Liberation of Angola (FNLA), having fought the MPLA with UNITA during the war for independence, played almost no role in the Civil War. Additionally, the Front for the Liberation of the Enclave of Cabinda (FLEC), an association of separatist militant groups, fought for the independence of the province of Cabinda from Angola. With the assistance of Cuban soldiers and Soviet support, the MPLA managed to win the initial phase of conventional fighting, oust the FNLA from Luanda and become the "de facto" Angolan government. The FNLA disintegrated, but the U.S. and South Africa-backed UNITA continued its irregular warfare against the MPLA-government from its base in the east and south of the country.