In May 1988 the Derg decided that before it could concentrate on destroying the EPLF, it would have to first eliminate the TPLF. Thus Operation Adwa was devised to seize the main TPLF base at Adi Ramets in Gondar Province. The Third Revolutionary Army's 603rd and 604th Corps were to play the main role, while the 605th Corps secured the rear, in Wello. The TRA's command structure was disrupted when Major General Mulatu Negash, the army commander, was supplanted by the arrival of Mengistu's favorite, Captain Lagesse Asfaw.