After the Carnation Revolution on April 25, 1974, Cape Verde became more autonomous but continued to have a governor from overseas, later that post became High Commissioner. Widespread unrest forced the government to negotiate with the PAIGC, and agreements for an independent Cape Verde were on the table. Pedro Pires returned to Praia on October 13 after being exiled for over a decade. After his 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.