Under Haile Selassie Regime Oromo was banned from education, and use in administrationThe Amhara culture dominated throughout the eras of military and monarchic rule. Both the Haile Selassie and the Derg government relocated numerous Amharas into southern Ethiopia include present day of oromia region where they served in government administration, courts, church and even in school, where Oromo texts were eliminated and replaced by Amharic. The Abyssinian elites perceived the Oromo identity and languages as opposing the expansion of Ethiopian national identity. In 2019, the Irreecha festival was celebrated in Addis Ababa after 150 years of being banned.The Arsi Oromo demonstrated fierce resistance against the Abyssinian conquest of 1881-6, when Menelik II conducted several unsuccessful invasion campaigns against their territory. They put up stiff opposition against an enemy equipped with modern European firearms, until they were defeated in 1886. In the 1940s the Arsi Oromo with the people of Bale province joined the Harari Kulub movement an affiliate of the Somali Youth League that peacefully opposed Amhara Christian domination of Hararghe. The Ethiopian government brutally suppressed the ethno-religious movement using violence. During the 1970s the Arsi faced persecution by the Ethiopian government thus formed alliances with Somalia.