In 1991 Mengistu's government was overcome by the Ethiopian People's Revolutionary Democratic Front (EPRDF), People's Front for Democracy and Justice (PFDJ, former EPLF), Oromo Liberation Front (OLF) and other opposition factions. After the defeat of the military government, the provisional government disbanded the former national army and relied on its own guerrilla fighters. In 1993, however, the Tigrayan-led government announced plans to create a multi-ethnic defense force. This process entailed the creation of a new professional army and officer class and the demobilization of many of the irregulars who had fought against the military government. With the collapse of the Soviet Union Ethiopia again turned to the Western powers for alliance and assistance. However, many Tigrayan officers remained in command positions. This transformation was still underway when war with Eritrea broke out in 1998, a development that saw the ranks of the armed forces swell along with defense expenditures.