In July 1991, the TPLF, the Oromo Liberation Front ( OLF ), and others – established the Transitional Government of Ethiopia ( TGE ), which consisted of an 87-member Council of Representatives and guided by a national charter that functioned as a transitional constitution.

In 1973, Oromo discontent with their position led to the formation of the Oromo Liberation Front ( OLF ), which began political agitation in the Oromo areas.

In December 2009, a 96-page report titled Human Rights in Ethiopia: Through the Eyes of the Oromo Diaspora, compiled by the Advocates for Human Rights, documented human rights violations against the Oromo in Ethiopia under three successive regimes: the Abyssinian Empire under Haile Selassie, the Marxist Derg and the current Ethiopian government of the Ethiopian People ’ s Revolutionary Democratic Front ( EPRDF ), dominated by members of the Tigray People ’ s Liberation Front ( TPLF ) and which was accused to have arrested approximately 20, 000 suspected OLF members, to have driven most OLF leadership into exile, and to have effectively neutralized the OLF as a political force in Ethiopia.

Plans to introduce Oromo instruction in the schools, however, were not realized until the government of Mengistu Haile Mariam was overthrown in 1991, except in regions controlled by the Oromo Liberation Front ( OLF ).

It is an alliance of four other groups: the Oromo Peoples ' Democratic Organization ( OPDO ), the Amhara National Democratic Movement ( ANDM ), the South Ethiopian Peoples ' Democratic Front ( SEPDF ) and the Tigrayan Peoples ' Liberation Front ( TPLF ).

The first armed conflict following the independence and unification of the former British and Italian colonies, known collectively as the Somali Republic, began in 1963 in an ethnic Oromo and Somali district, Elekere, then part of Bale province, instigated by the Oromo founder of the United Liberation Forces of Oromia, Waqo Gutu.

Other parties that joined to create the UEDF include: Afar Revolutionary Democratic Unity Front ), All-Ethiopia Socialist Movement ( MEISON ), Ethiopian Democratic Union-Tehadiso, Ethiopian National United Front, Ethiopian People Federal Democratic Unity Party ( HIBREHIZB ), Ethiopian People's Revolutionary Party, Gambela People's United Democratic Front, Oromo People's Liberation Organization ( OPLO-IBSO ), and Tigrean Alliance for Democracy.

Tensions rose in the Kenyan side of Moyale in early 1999, after an Imam was shot dead during an Ethiopian raid across the Ethiopian-Kenyan border in pursuit of rebels of the Oromo Liberation Front ( OLF ).

His funeral was attended by thousands of Oromos in Ambo ; police arrested more than 37 people, stating that they were supporters of the Oromo Liberation Front ( OLF ) on 3 September.

The last military action of the Oromo Liberation Front ( OLF ) before the demise of the Derg 1991 occurred at Dembidolo, when some of its units reportedly killed more than 700 government soldiers.

However, when the OLF found that their efforts to field candidates in the rest of the Oromia region were frustrated by the Oromo Peoples ' Democratic Organization, which also had the support of the ruling Tigrayan People's Liberation Front, the OLF withdrew from the government in 1992.

In response, the Oromo Liberation Front ( OLF ) said in a broadcast on the Radio Voice of Oromo Liberation ( Frankfurt am Main ) on 15 April 1991: " The OLF strongly opposes the phrase: liberating Wellega or the Oromo nation.

During the Ethiopian Civil War, with help from the Tigrayan People's Liberation Front the Oromo Liberation Front ( OLF ) captured Asosa from the Derg in early January 1990, and held the city for a brief time.

In July 2008, the UEDF joined the Oromo Federalist Democratic Movement, the Somali Democratic Alliance Forces, and the Union of Tigrians for Democracy and Sovereignty ( also known as Arena ) to found the Ethiopian Democratic Unity Front or simply Medrek, a new coalition of opposition parties and activists.

The Borana Oromo of southern Ethiopia in the Horn of Africa also have a class system, where the Watta, an acculturated Bantu group, represent the poorest class.

* 1782 – Battle of Wuchale: Emperor Tekle Giyorgis pacifies a group of Oromo near Wuchale.

The Oromo (, " The Powerful ";, ’ Oromo ) are an ethnic group found in Ethiopia, northern Kenya, and parts of Somalia.

" In terms of descent, the group that became politically dominant in Shewa – and Subsequently in Ethiopia – was a mixture of Amhara and Oromo ; in terms of language, religion and cultural practices, it was Amhara.

The Borana Oromo, also called the Boran, are a pastoralist group living in southern Ethiopia ( Oromia ) and northern Kenya.

* The Walloo Oromo, who are the northernmost group, and live predominantly in the Oromia Zone of the Amhara Region, as far north as Lake Ashenge, and are also found in the southern Raya Azebo woreda in the Tigray Region.

* March 14 – Battle of Wuchale: Emperor Tekle Giyorgis pacifies a group of Oromo near Wuchale.

Derartu ( ዳራርቱ ቱሉ ), a member of the Oromo ethnic group, grew up tending cattle in the village of Bekoji in the highlands of Arsi Province.

Islam is the religion of the overwhelming majority of the Somali, Afar, Argobba and Harari, and the largest group of the Oromo peoples of Ethiopia according to the 1994 national census.

Upon learning in 1994 that a local group of Amhara had formed a group called Galla-geday (" Oromo killers "), the local people voiced their objection to this group, and demanded its dissolution.

The Bale Mountains are the true ancestral home of the Oromo, the largest single ethnic group in the Horn of Africa.

The Borana Oromo, also called the Boran, are a pastoralist ethnic group living in southern Ethiopia ( Oromia ) and northern Kenya.

Just prior to his accession in 1606, Susenyos I made his way to the lake Hayk area, where he expelled a group of Oromo who had infiltrated into the vicinity of Istifanos Monastery.

She is a member of the Oromo ethnic group from the high-altitude Arsi Zone of the Oromia Region.

Abba Seru Gwangul ( died 1778 ) was a chieftain of the Yejju Oromo, an ethnic group of Ethiopia.

OFDM Secretary General Bekele Jirata was arrested November 2008, along with at least 14 other ethnic Oromo for alleged ties to the outlawed Oromo Liberation Front and a previously unknown armed group, Kawerj, connections which were denied by the OFDM.

The most populous Cushitic language is Oromo with about 35 million speakers, followed by Somali with about 18 million speakers, and Sidamo in Ethiopia with about 2 million speakers.

Comfort Momoh, a specialist midwife in England, writes that in Ethiopia the Falashas perform it when the child is a few days old, the Amhara on the eighth day of birth, while the Adere and Oromo choose between four years and puberty.

* 1608 – Emperor Susenyos of Ethiopia surprises an Oromo army at Ebenat ; his army reportedly kills 12, 000 Oromo at the cost of 400 men.

With 30 million members, they constitute the single largest ethnicity in Ethiopia and approximately 34. 49 % of the population according to the 2007 census .< ref name =" census2007p66 "> Their native language is Oromo ( also called Afaan Oromoo and Oromiffa ), which is part of the Cushitic branch of the Afro-Asiatic language family.

Many historians agree that some Oromo clans ( Bale ) have lived in the southern tip of present-day Ethiopia for over a millennium.

They suggest that a great Oromo migration brought most Oromos to present-day central and western Ethiopia in the 16th and 17th centuries.

Historical maps of the ancient Aksum / Abyssinian Empire and Adal / Somali empires indicate that Oromo people are newcomers to most of modern-day central Ethiopia.

Oromo ruler Iyasu V of Ethiopia | Iyasu V ( Lij Iyasu ), Emperor of Ethiopia from 1913 – 16.

In the general view of Oromo people's role in Ethiopia, Ras Gobana Dacche is a famous Oromo figure who led the development of modern Ethiopia and the political and miliatary incorporation of more territories into Ethiopian borders.

Some Oromo writers believe that the Oromo Ras Gobena and the Amhara Menelik II were the first two people in Ethiopia with the concept of national boundary that brought various different ethno-linguistic communities under a politically and militarily centralized rule.

Both ethnically mixed Oromos and those with full Oromo descent held high leadership positions in Ethiopia.

During the Zemene Mesafint or " Age of Princes " of Ethiopia, Emperors became figureheads, controlled by warlords like Ras Mikael Sehul of Tigray, and by the Oromo Yejju dynasty, which later led to 17th century Oromo rule of Gondar, changing the language of the court from Amharic to Afaan Oromo.