Background:
The Gambia gained its independence from the UK in 1965. Geographically surrounded by Senegal, it formed a short-lived federation of Senegambia between 1982 and 1989. In 1991 the two nations signed a friendship and cooperation treaty, but tensions have flared up intermittently since then. Yahya JAMMEH led a military coup in 1994 that overthrew the president and banned political activity. A new constitution and presidential elections in 1996, followed by parliamentary balloting in 1997, completed a nominal return to civilian rule. JAMMEH has been elected president in all subsequent elections including most recently in late 2011.
Gambia, The Introduction 2015
https://photius.com/world_fact_book_2015/gambia_the/gambia_the_introduction.html
SOURCE: 2015 CIA WORLD FACTBOOK AND OTHER SOURCES
