EPRDF coalition overthrows the Derg (1988-1991)
The Ethiopian People's Revolutionary Democratic Front united ethnic-based insurgencies, including the TPLF, the Ethiopian People's Democratic Movement, and the Oromo People's Democratic Organization, against Mengistu Haile Mariam's Derg regime. Coordinated offensives from multiple fronts forced Mengistu from power in May 1991.
The Derg fell and a transitional government was formed, with the coalition ruling Ethiopia for the next two decades.
TPLF dominance within the coalition bred resentment in other regions, creating the grievances behind today's conflicts in Amhara and Oromia.
Shows that Ethiopian armed groups can topple a central government through coordinated alliance, and that post-victory power-sharing disputes can seed the next war.
