ocr: The Portuguese explored the area in the 15th century. In 1879,Portuguese Guinea became a colony. A war of independence began in the 1960s,led' by the PAIGC. - 1974 Independence. PAIGCled by Luis Cabral takes power. 1980 Coup.Joao Vieira replaces Cabral. 1990 Vieira accepts principle ofmultiparty politics. 1991-1992 Opposition parties formed; election postponed. 1993 Coup attempt.Leading opposition tigure Joào da Costa temporarily detained.
