Derg

The Derg or Dergue (, ), officially the Provisional Military Administrative Council (PMAC), and also often simply known as Socialist Ethiopia, was the military junta that ruled Ethiopia, including present-day Eritrea, from 1974 to 1987, when they formally "civilianized" the administration, though remaining in power until 1991.

civil war in Ethiopia between 1974 and 1991

1974 period of sociopolitical upheaval in Ethiopia