Most African states had fully broken ties after the 1973 Yom Kippur War, and Israel increased its cultivation of ties with the similarly isolated government in Pretoria. Israeli ties and trade with South Africa became more extensive. According to Ethan A. Nadelmann, the relationship developed because many African countries broke diplomatic ties with Israel during the 1970s following Israeli occupation of the West Bank and Gaza during the Arab–Israeli wars, causing Israel to deepen relations with other isolated countries. In the 1970s Israel aided the National Liberation Front of Angola proxy forces organized and trained by South Africa and the CIA to forestall the formation of a government led by the MPLA during the Angolan Civil War. Israel sent a plane full of 120 mm shells sent via Zaire to the FNLA and Unita and a shipment of 50 SA-7 missiles. Israel remained officially opposed to the apartheid system, but it also opposed international embargoes. Israeli officials sought to coordinate ties with South Africa within a tripartite framework between Israel, the United States, and South Africa. There was anti-apartheid sentiment among the Jewish communities of both South Africa and Israel. However, on the Israeli side, many saw it necessary to cooperate with any country willing to be friendly with Israel and support its existence. For the South African government, there was a desire to expand its network of friendships.