At the time of the Portuguese Colonial War Yugoslavia provided military and other forms of aid to MPLA and other liberation movements. Yugoslav support to decolonization movements in Africa affected Yugoslav relations with superpowers but was also motivated by its rivalry with Cuba over the leadership in the Non-aligned movement. In 1976 President of Yugoslavia Josip Broz Tito explicitly endorsed Cuban intervention in Angola despite the opposition from the United States. President of Angola Agostinho Neto visited Yugoslavia on three occasion in 1968, 1971 1973 and 1977 while Prime Minister of Angola Lopo do Nascimento visited Yugoslavia in 1976.