Mauritius (independent Commonwealth realm, then republic)
Who & why: Mauritius becomes independent from Britain on 12 March 1968 as a Commonwealth realm under the British monarch, led by Prime Minister Seewoosagur Ramgoolam, whose Indo-Mauritian political base reflects the demographic legacy of 19th-century indentured immigration. Sugar remains the economic backbone at independence, though the country diversifies successfully into textiles, tourism, and financial services in the decades that follow. On 12 March 1992, the 24th anniversary of independence, Mauritius becomes a republic within the Commonwealth, replacing the monarch with a president as head of state while changing nothing else about the flag or the political system otherwise. Since independence Mauritius has held regular, competitive multiparty elections without interruption or coup — a genuinely rare record among postcolonial African and Indian Ocean states.
What it represents: four equal horizontal bands — red for the struggle for independence, blue for the Indian Ocean surrounding the island, yellow for the light of independence, and green for the island's year-round agriculture.