Republic of Rwanda (post-genocide)
Who & why: the Rwandan Patriotic Front (RPF), a rebel movement led largely by Tutsi exiles, ends the 1994 genocide by taking military control of the country in July that year, after approximately 800,000 Tutsi and moderate Hutu are killed over roughly one hundred days following the shooting-down of President Habyarimana's plane on 6 April 1994 — one of the defining atrocities of the late twentieth century, and a direct legacy of the ethnic categorization colonial administration had hardened decades earlier. Paul Kagame, the RPF's military commander, becomes president in 2000 and has led the country since, overseeing a period of reconstruction, reconciliation programs, and rapid economic development.
What it represents: a new flag, adopted in 2001, deliberately replaces the old red-yellow-green tricolor (associated with the genocide-era government) with a different color scheme: blue for peace and happiness, yellow for economic development, green for hope and prosperity, and a golden sun with twenty-four rays representing enlightenment and unity.