Cape Verde when Portuguese explorers discovered and colonized the islands, establishing the first European settlement in the tropics. Ideally located for the Atlantic slave trade, the islands grew prosperous throughout the 16th and 17th centuries, attracting merchants, privateers, and pirates. The end of slavery in the 19th century led to economic decline and emigration. Cape Verde gradually recovered as an important commercial center and stopover for shipping routes. Incorporated as an overseas department of Portugal in 1951, the islands continued to campaign for independence, which was peacefully achieved in 1975. Since the early 1990s, Cape Verde has been a stable representative democracy,
African Party for the Independence of Guinea and Cape Verde union finally broke down in 1980 following the military coup led by João Bernardo Vieira against the Cape Verdean Cabral. The Cape Verdean branch of PAIGC was subsequently converted into a separate party, the African Party for the Independence of Cape Verde (PAICV). Under Vieira, the party continued to govern the country in the 1980s and 1990s. One-party elections were held in 1984 and 1989, and Vieira was re-elected as PAIGC Secretary-General at the party's fourth congress in November 1986. Following the introduction of multi-party politics in May 1991, the first multi-party elections were held in 1994. The general elections