Congo By dwlehrhardt Period: 1956 to 1956 x 1960 Fulbert Youlou president Aug 15, 1960 Independence 1963 Alphonse Massamba-Débat president 1968 Maj. Marien Ngouabi head of state Dec 31, 1969 Renaming to People's Republic of the Congo 1977 Assassination Ngouabi 1977 Joachim Yhombi-Opango head of state 1979 Col. Denis Sassou-Nguesso head of state 1979 New Marxist-Leninist constitution 1986 Structural adjustment reforms 1992 Democratic constitution promulgated 1992 Pascal Lissouba elected president 1994 Civil conflict 1997 French/Angolan support for insurrection 1997 Denis Sassou-Nguesso president 1999 Truce 2002 Sassou-Nguesso elected president Oct 25, 2015 Constitutional referendum
