The Oromo Liberation Front is an organisation established in 1973 by Oromo nationalists to promote self-determination for the Oromo people against perceived Abyssinian colonial rule. The proponents of the movement hold that Amhara hegemony has been oppressing and suppressing the Oromo people and their culture.The movement is the culmination of over 70 years of uncoordinated resistance by Oromos against this condition. It has been outlawed and labelled a terrorist organisation by the Ethiopian government. The OLF has offices in Asmara (a military base), Washington, D.C. and Berlin from where it operates Amharic and Oromo-language radio stations
In 1967, the imperial regime of Haile Selassie I outlawed the Mecha and Tuluma Self-Help Association (MTSHA) and later instigated a wave of mass arrests and killings of its members and leaders. Prominent military officer and leader of the association, Colonel General Tadesse Birru, was also arrested. This reaction by the regime had been caused by the popularity of the organization among the Oromos and its links to the Bale Oromo resistance movement.
One of the association's members, Hussein Sora, escaped to Somalia in 1967. He and other Oromo refugees formed a rebel group called the Ethiopian National Liberation Front of which he was named Secretary General. The ENLF soon moved to Yemen and began training members of the Oromo diaspora.
The first attempt to enter the country was command by Jaarraa Abbaa Gadaa but it failed when Somali security forces tracked down the members and arrested them trying to enter Ethiopia through northern Somalia. The second attempt proved to be more successful and the second group of rebels made camp in the Chercher Mountains. At this point, the group decided to operate under the name of "Oromo" instead of "Ethiopia.