Quick Facts
Born:
1937, Kefa province, Ethiopia (age 88)

Mengistu Haile Mariam (born 1937, Kefa province, Ethiopia) is an Ethiopian army officer and was the head of state (1974–91). He helped overthrow the centuries-old monarchy and attempted to mold Ethiopia into a communist state.

Mengistu received officer training at Holeta and additional training in the United States. Rising to the rank of major, he became one of a group of junior officers and enlisted men who, discontented with their lack of patronage and promotion within the military, plotted rebellion against the government of Emperor Haile Selassie I. In June 1974 Mengistu was made chairman of the Armed Forces Coordinating Committee (known as the Dergue), a committee of revolutionary soldiers, and, after the arrest of the emperor in September, he was made a vice-chairman of the Provisional Military Administrative Council (PMAC), which was run by the Dergue and which assumed the functions of government. On November 23, 1974, Mengistu ordered the assassination of the PMAC’s moderate chairman and urged the killing of 60 aristocrats and former officials of the old imperial regime. By killing selected enemies within the PMAC, Mengistu became the acknowledged strongman of a regime that proceeded to nationalize industries and farmlands.

In February 1977 Mengistu, now a lieutenant colonel, survived a battle between his supporters and those of rivals on the PMAC. The chairman and several other members were killed, and Mengistu became head of state and chairman. He then unleashed a bloody “Red Terror Campaign” to crush armed opponents among the civilian populace, and later that year he solicited Soviet weaponry and Cuban troops to repel an invasion of the Somali-speaking Ogaden region by Somalia. As undisputed ruler of the country, he oversaw the establishment of the Workers’ Party of Ethiopia in 1984, the drafting of a constitution for Ethiopia in 1986 (endorsed in 1987), and the election by a new national legislature of himself as president in September 1987. By then Mengistu faced armed rebellion in the northern regions of Tigray and Eritrea, a series of the worst droughts and famines ever to afflict Ethiopia, an agricultural economy ruined by the forced collectivization of farms and the relocation of entire populations, and occasional coup attempts by enemies within the regime. The withdrawal of Soviet support further weakened Mengistu’s power, and in May 1991 he summarily resigned his post and fled to Zimbabwe.

Haile Selassie
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Successor Ethiopian regimes unsuccessfully lobbied the Zimbabwean government for Mengistu’s extradition on charges of genocide. Tried in absentia, he was found guilty of genocide in December 2006 and was given a life sentence the next year. Following a successful appeal from the prosecution, which argued that Mengistu’s crimes merited more than a life sentence, in May 2008 he was sentenced to death.

This article was most recently revised and updated by Encyclopaedia Britannica.

Ethiopia, landlocked country on the Horn of Africa. The country lies completely within the tropical latitudes and is relatively compact, with similar north-south and east-west dimensions. The capital is Addis Ababa (“New Flower”), located almost at the centre of the country. Ethiopia is the largest and most populated country in the Horn of Africa. With the 1993 secession of Eritrea, its former province along the Red Sea, Ethiopia became landlocked.

Ethiopia is one of the world’s oldest countries, its territorial extent having varied over the millennia of its existence. In ancient times it remained centred on Aksum, an imperial capital located in the northern part of the modern state, about 100 miles (160 km) from the Red Sea coast. The present territory was consolidated during the 19th and 20th centuries as European powers encroached into Ethiopia’s historical domain. Ethiopia became prominent in modern world affairs first in 1896, when it defeated colonial Italy in the Battle of Adwa, and again in 1935–36, when it was invaded and occupied by fascist Italy. Liberation during World War II by the Allied powers set the stage for Ethiopia to play a more prominent role in world affairs. Ethiopia was among the first independent nations to sign the Charter of the United Nations, and it gave moral and material support to the decolonization of Africa and to the growth of Pan-African cooperation. These efforts culminated in the establishment of the Organization of African Unity (since 2002, the African Union) and the United Nations Economic Commission for Africa, both of which have their headquarters in Addis Ababa.

Quick Facts
Ethiopia
See article: flag of Ethiopia
Audio File: National anthem of Ethiopia
Head Of Government:
Prime Minister: Abiy Ahmed
Capital:
Addis Ababa
Population:
(2025 est.) 111,702,000
Head Of State:
President: Taye Atske Selassie
Form Of Government:
federal republic with two legislative houses (House of the Federation [153]; House of Peoples’ Representatives [547])
Official Language:
none1
Official Religion:
none
Official Name:
Federal Democratic Republic of Ethiopia
Total Area (Sq Km):
1,120,000
Total Area (Sq Mi):
432,432
Monetary Unit:
birr (Br)
Population Rank:
(2025) 13
Population Projection 2030:
125,234,000
Density: Persons Per Sq Mi:
(2025) 258.3
Density: Persons Per Sq Km:
(2025) 99.7
Urban-Rural Population:
Urban: (2024) 23.7%
Rural: (2024) 78.3%
Life Expectancy At Birth:
Male: (2022) 66.1 years
Female: (2022) 70.4 years
Literacy: Percentage Of Population Age 15 And Over Literate:
Male: (2017) 59%
Female: (2019) 40%
Gni (U.S.$ ’000,000):
(2023) 142,605
Gni Per Capita (U.S.$):
(2023) 1,110
  1. Amharic is the “working” language.

Land