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Derg taking over.
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Derg abolished the monarchy and adopted Marxist-Leninist communism as their official ideology, establishing themselves as a provisional government for the process of building a socialist state in Ethiopia.
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The Qty Shibir was escalated on 3 February 1976 following the appointment of Mengistu Haile Mariam as Chairman of the Derg, who took a hardline stance against opponents. The urban guerrilla warfare saw brutal tactics used on all sides, including executions, assassinations, torture, and imprisonment without trial.
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Colonel Mengistu Haile Mariam emerges as a leader of the Derg pro-Soviet military regime.
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By August 1977, the EPRP and MAISON were devastated, with their leadership either dead or fleeing to the countryside to continue their activities in stronghold areas, but despite this, the Derg did not successfully consolidate their power as much as hoped.
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Thousands of government opponents die in "Red Terror" orchestrated by Col Mengistu; collectivization of agriculture begins; Tigrayan People's Liberation Front launches war for regional autonomy.
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Somalia invades Ethiopia's Ogaden region, and are defeated the following year with massive help from the Soviet Union and Cuba.
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The Soviet Union ended its support for the PDRE
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the government was overwhelmed by the increasingly victorious rebel groups
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The Derg fulfilled its main slogan of "Land to the Tiller" by redistributing land in Ethiopia that once belonged to landlords to the peasants tilling the land. However, mismanagement, corruption, and general hostility to the Derg's violent rule was coupled with the draining effects of constant warfare and the separatist guerrilla movements in Eritrea and Tigray, resulting in a drastic decline in general productivity of food and cash crops.
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The worst famine in a decade strikes; Western food aid sent; thousands forcibly resettled from Eritrea and Tigre
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The Derg continued its attempts to end the rebellions with military force by initiating several campaigns.
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In May 1991, Mengistu's government was finally overthrown by its own officials and a coalition of rebel forces, the Ethiopian People's Revolutionary Democratic Front (EPRDF), after their bid for a push on the capital Addis Ababa became successful.
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A peace treaty was signed. Eritrea gave up all of its claims in Ethiopia. Ethiopia gave up all of its claims in Eritrea. Diplomatic relations were re-established.