 Complete the following phrase:  The second half of the 1970s however saw South Africa facing severe amounts of international isolation and criticism. In 1973 the UN labelled the policy of apartheid a Crime against Humanity, magnified further by the brutal state repression and subsequent mass incarcerations and deaths following the Soweto uprising in 1976 and the death of prominent anti-apartheid activist Steve Biko in 1977. The following year a UN arms embargo, loosely in place since 1962, became mandatory. The ensuing international economic disinvestment from South Africa was stepped up, placing huge strains on the economy. Coupled with these severe problems, the cornerstones of the countrys regional foreign policy faced collapse and complete transformation with the end of Portuguese rule in Angola and Mozambique in 1975, and the negotiated settlement in Ian Smiths Rhodesia to the end of white minority rule in 1979. As South Africa became increasingly involved in the 