According to the official policy of the Salazar regime, inspired on the concept of Lusotropicalismo, Mozambique was claimed as an integral part of the "pluricontinental and multiracial nation" of Portugal, as was done in all of its colonies to Europeanise the local population and assimilate them into Portuguese culture. This policy was largely unsuccessful, however, and African opposition to colonisation led to a ten-year independence war that culminated in the Carnation Revolution at Lisbon in April 1974 and the independence from Portugal in June 1975.