The sovereign state consists of three major islands and numerous smaller islands, all in the volcanic Comoro Islands. The major islands are commonly known by their French names: northwesternmost Grande Comore (Ngazidja), Mohéli (Mwali), and Anjouan (Ndzuani). The country also claims a fourth major island, southeasternmost Mayotte (Maore), although Mayotte voted against independence from France in 1974. Since that referendum Mayotte has never been administered by an independent Comoros government, and continues to be administered by France as an overseas department. France has vetoed United Nations Security Council resolutions that would affirm Comorian sovereignty over the island. In addition, Mayotte became an overseas department and a region of France in 2011 following a referendum which was passed overwhelmingly.