The Derg, officially the Provisional Military Administrative Council (PMAC), was the Marxist–Leninist military dictatorship that ruled Ethiopia, then including present-day Eritrea, from 1974 to 1987, when the military leadership or junta formally "civilianized" the administration but stayed in power until 1991.

The Ethiopian Red Terror, also known as the Qey Shibir, was a violent political repression campaign of the Derg against other competing Marxist-Leninist groups in Ethiopia and present-day Eritrea from 1976 to 1978. The Qey Shibir was an attempt to consolidate Derg rule during the political instability after their overthrow of Emperor Haile Selassie in 1974 and the subsequent Ethiopian Civil War. The Qey Shibir was based on the Red Terror of the Russian Civil War, and most visibly took place after Mengistu Haile Mariam became chairman of the Derg on 3 February 1977. It is estimated that 10,000 to 980,000 people were killed over the course of the Qey Shibir.