Portuguese Angola Portuguese protectorate by the 1885 Treaty of Simulambuco. Sometime during the 1920s, it became incorporated into the larger colony (later the overseas province) of Portuguese Angola. The two colonies had initially been contiguous, but later became geographically separated by a narrow corridor of land, which Portugal ceded to Belgium allowing Belgian Congo access to the Atlantic Ocean. Following the decolonisation of Portuguese Angola with the 1975 Alvor Agreement, the short-lived Republic of Cabinda unilaterally declared its independence. However, Cabinda was soon overpowered and re-annexed by the newly proclaimed People's Republic of Angola and never achieved international recognition. Portuguese explorers and
Angola–United States relations the Republican administration of President Ford attempted to counter them. This was thwarted by the Tunney/Clark amendment, passed by a Democratic congress forbidding any involvement. The United States opposed Angola's membership in the United Nations from its declaration of independence in 1975 to its acceptance in December 1976. Angola did not have formal relations with the United States until 1993. Fidel Castro regarded the attitude of the United States: Why were they vexed? Why had they planned everything to take possession of Angola before 11 November? Angola is a country rich in resources. In Cabinda there is lots of oil.