 Complete the following phrase:  Over the next few years, general opinion believed that the two officersAtnafu and Mengistuwere engaged in a bitter rivalry for control of the shadowy Derg. The relationship between the two vice-chairmen was always slightly mysterious, notes the Ottaways. The two were rumoured to be bitter enemies from the beginning, to the point of pulling guns on each other in meetings. Yet, Atnafu always seemed to be on Mengistus side at times of major crisis within the Derg. He directed the effort in May 1976 to recruit, arm and train tens of thousands of peasants who would serve as a militia to supplement the weary soldiers of the regular army fighting at the 