History of Cape Verde return, Portugal signed the 1975 Algiers Agreement. On July 5, at Praia, Portugal's Prime Minister Vasco Goncalves turned over power to National Assembly President Abilio Duarte, thus the colonial history of Cape Verde ended when Cape Verde become independent. However, there was no armed conflict in Cape Verde and ultimately independence for Cape Verde resulted from negotiation with Portugal. However, the catalyst for the independence of Cape Verde was the PAIGC branch in Guinea-Bissau, which launched an ultimately successful war against the Portuguese in Guinea-Bissau, who eventually compelled Portugal to accept independence for Cape Verde. Immediately following a November 1980
Boa Vista, Cape Verde salt deposits, which were mainly exploited by the English. In 1820, after many pirate attacks, the population moved to Porto Inglês, later renamed Sal Rei, which had been founded at the end of the 18th century. As did much of the Cape Verdean economy, the exploitation of salt on Boa Vista also relied largely on slavery. A Portuguese-British commission to end slavery was established in Boa Vista in 1842, but slavery was not completely abolished until 1876. Until 1935 the municipality of Boa Vista also covered the island of Sal. In 1975, Cape Verde declared its independence. Administratively, the island