Republic of Senegal (independent)
Who & why: Senegal withdraws from the Mali Federation on 20 August 1960 after weeks of escalating conflict between Senegalese leaders and Sudanese Federal Prime Minister Modibo Keïta over how much power the federal government in Dakar should hold; Senegalese Prime Minister Mamadou Dia and President-to-be Léopold Sédar Senghor move to seal the union's end and declare full independence the same day. Senghor, already internationally known as a poet and a founder of the Négritude literary movement, is elected Senegal's first president the following month.
What it represents: a green-yellow-red vertical tricolor — the Pan-African colors, drawn ultimately from Ethiopia's flag and shared with many newly independent African states — distinguished from its neighbors by a small central green five-pointed star on the yellow band. Green stands for hope and agriculture, yellow for wealth and labor, red for sacrifice and independence; the design, credited in large part to Senghor himself, was fixed by law on the day of independence.