evidence: Comoros, an independent state comprising three of the Comoro Islands in the Indian Ocean, off the coast of East Africa. A fourth island of the Comorian archipelago, Mayotte, is claimed by the country of Comoros but administered by France. [...] Although the early history of the islands is uncertain, they are thought to have been explored by Arab and Persian traders in antiquity and, like Madagascar, settled by small numbers of Malayo-Indonesian peoples, gaining a sizable population only when Bantu-speaking peoples from the African mainland settled there. Shīrāzi Persians are thought to have arrived later, establishing Sunni Islam as the dominant religion. The ensuing Shīrāzi sultanates established trade relations with other countries along the Indian Ocean and developed a thriving economy based on the sale of spices and slaves. The opening of the Suez Canal substantially lessened the islands’ importance as an entrepôt, though not their strategic value. European colonial powers agreed that the Comorian archipelago would come under French rule in 1886–87, and it became an overseas territory of France in 1947. Three of the islands gained independence in 1975. [...] The Comoros are a group of islands at the northern end of the Mozambique Channel of the Indian Ocean, between Madagascar and the southeast African mainland, about 180 miles (290 km) off the eastern coast of Africa. The islands from northwest to southeast include Grande Comore (N’gazidja), Mohéli (Mwali), Anjouan (Ndzuwani), and Mayotte (Mahore).