Comoros has endured 19 coups or attempted coups since gaining independence from France in 1975. In 1997, the islands of Anjouan and Moheli declared independence from Comoros. In 1999, military chief Col. AZALI seized power in a bloodless coup, and helped negotiate the 2000 Fomboni Accords power-sharing agreement in which the federal presidency rotates among the three islands, and each island maintains its own local government. AZALI won the 2002 Presidential election, and each island in the archipelago elected its own president. AZALI stepped down in 2006 and President SAMBI took office. Since 2006, Anjouan’s President Mohamed BACAR has refused to work effectively with the Union presidency. This year BACAR effected Anjouan’s de-facto secession from the Union, refusing to step down in favor of fresh Anjouanais elections when Comoros’ other islands held legitimate elections in July. The African Union (AU) has stepped in to assist in resolving the political crisis, including applying sanctions and a naval blockade on Anjouan, but the situation remains at an impasse.

https://www.cia.gov/library/publications/the-world-factbook/geos/cn.html

http://en.wikipedia.org/wiki/Comoros