Republic of Niger (independent)
Who & why: Niger becomes independent on 3 August 1960 under President Hamani Diori. Since then it has experienced repeated political instability — multiple military coups (including in 1974, 1996, 1999, 2010, and most recently 2023) interspersed with periods of civilian, multiparty rule — alongside recurring Tuareg rebellions in the north. Through all of it, the flag adopted before independence has never changed.
What it represents: a horizontal orange-white-green tricolor adopted 23 November 1959: orange for the Sahara desert of the north, green for the fertile Niger River valley and savanna of the south, white for purity and the Niger River itself, and a central orange disc for the sun.