Workers' Party of Ethiopia in the context of "Derg"

The People's Democratic Republic of Ethiopia (PDRE; Amharic: የኢትዮጵያ ሕዝባዊ ዲሞክራሲያዊ ሪፐብሊክ, romanized: Ye-Ītyōṗṗyā Həzbāwī Dīmōkrāsīyāwī Rīpeblīk) was a socialist state that existed in Ethiopia and present-day Eritrea from 1987 to 1991.

The PDRE was established in February 1987 as a Marxist-Leninist one-party state upon the adoption of the 1987 Constitution, three weeks after its approval in the national referendum. The Derg, the military junta that had ruled Ethiopia as a provisional government since 1974, planned for transition to civilian rule and proclaimed a socialist republic in 1984 after five years of preparation. The Workers' Party of Ethiopia (WPE) was founded that same year as a vanguard party led by Derg chairman Mengistu Haile Mariam. The Derg was dissolved with the proclamation of the PDRE, but continued to rule de facto until September when the new government took office, three months after the June general election. It was dominated by surviving Derg members, with Mengistu as both President of Ethiopia and General Secretary of the WPE.

A constitutional referendum was held in Ethiopia on 1 February 1987. The new constitution would make the country a one-party socialist state with the Communist Workers' Party of Ethiopia as the sole legal party. It was approved by 81% of voters, with a 96% turnout. It was promulgated on 22 February, inaugurating the People's Democratic Republic of Ethiopia.

Mengistu Haile Mariam (Amharic: መንግሥቱ ኀይለ ማርያም, pronunciation: [mənɡɨstu haɪlə marjam]; born 21 May 1937) is an Ethiopian former politician, revolutionary, and military officer who served as the head of state of Ethiopia from 1977 to 1991. He was General Secretary of the Workers' Party of Ethiopia from 1984 to 1991, chairman of the Derg—the Marxist–Leninist military junta that ruled Ethiopia—from 1977 to 1987, and president of the People's Democratic Republic of Ethiopia (PDRE) from 1987 to 1991.

The Derg seized power in the Ethiopian Revolution following the overthrow of Emperor Haile Selassie in 1974, marking the end of the Solomonic dynasty which had ruled Ethiopia since the 13th century. Mengistu purged his rivals within the Derg and made himself dictator of Ethiopia, attempting to modernize the feudal economy of Ethiopia through Marxist–Leninist-inspired policies such as nationalization and land redistribution. His bloody consolidation of power in 1977–1978 is known as the Ethiopian Red Terror—a brutal crackdown on opposition groups and civilians following a failed assassination attempt by the Ethiopian People's Revolutionary Party (EPRP) in September 1976, after it had ignored the Derg's invitation to join the union of socialist parties. The death toll is unknown but is estimated at between 30,000 and 750,000 by the Ethiopian Red Terror Documentation and Research Center.