Federal Democratic Republic of Ethiopia
Who & why: the Derg falls in 1991 as EPRDF-led rebel forces (a coalition dominated by the Tigrayan People's Liberation Front) take Addis Ababa, ending Mengistu's rule. A transitional government gives way to a new federal constitution in 1995, organizing Ethiopia into ethnically based regional states, with Eritrea's own independence formally recognized separately in 1993 after its decades-long war. Ethiopia has continued as a federal republic since, including a change of ruling coalition in 2018 under Abiy Ahmed and a devastating internal Tigray war from 2020-2022, though the flag and constitutional structure have remained the same throughout.
What it represents: the same green-yellow-red tricolor carried since the 1890s, now centered on a new emblem adopted in 1996 — a blue disc (representing peace) bearing a gold five-pointed star with rays (the "Star of Unity," standing for the equality and unity of Ethiopia's nations and peoples) — replacing the Lion of Judah of the imperial era and the Derg's own socialist emblem.