Portuguese language in Africa more recent migrations of refugees (some of whom speak Portuguese) to neighbouring countries such as Democratic Republic of Congo, Namibia, Zambia and South Africa. Other migrations involved returning Afro-Brazilian ex-slaves to places such as Nigeria, Benin, Togo, Angola and Mozambique. There are also some returning white Portuguese African refugees and their descendants from Brazil, Portugal, and South Africa to their former African controlled territories, mostly to Angola (up to 500,000) and Mozambique (350,000), and most importantly, there is the arrival of Portuguese post-colonial expatriates in Angola in the recent years, because of Portugal's economic interests and the Angolan economic boom.
Portuguese Colonial War though the Portuguese managed to destroy several PAIGC ships and free hundreds of Portuguese prisoners of war (POWs) at several large POW camps. One immediate result of "Operation Green Sea" was an escalation in the conflict, with countries such as Algeria and Nigeria now offering support to the PAIGC as well as the Soviet Union, which sent warships to the region (known by NATO as the "West Africa Patrol") in a show of force calculated to deter future Portuguese amphibious attacks on the territory of the Guinea-Conakry. The United Nations passed several resolutions condemning cross-border attacks of the Portuguese military