The black nationalist campaigns, referred to by the revolutionaries as the Second "Umvukela" /"Chimurenga" (liberation war), began in earnest in December 1972. During the ensuing Bush War, ZANLA and ZIPRA fought the Rhodesian Security Forces, and also regularly clashed with each other, despite their parent organisations being superficially allied from 1976 as the Patriotic Front. The war ended in December 1979 with the Lancaster House Agreement in London, following which Britain took interim direct control of the country to oversee fresh elections during early 1980. These were won by ZANU, which added "Patriotic Front" to its name (thereby becoming "ZANU–PF"), and Mugabe became the first Prime Minister of Zimbabwe when the UK granted independence in April 1980. Nkomo was made Minister of Home Affairs in the new Government.