The Eritrean People 's Liberation Front ( EPLF ) became Becoming the main separatist group in 1977 , expelling Removing the ELF from Eritrea , then exploiting the Ogaden War to launch Process_start a war of attrition against Ethiopia .

The dissidents had been becoming Becoming more powerful for nearly a decade following his abrupt switch of allegiance from the Soviet Union to the United States and the disastrous Ogaden War of 1977–1978 .