In July the Derg obtained key concessions from the emperor, Haile Selassie, which included the power to arrest not only military officers but government officials at every level. Soon both former Prime Ministers Tsehafi Taezaz Aklilu Habte-Wold and Endalkachew Makonnen, along with most of their cabinets, most regional governors, many senior military officers and officials of the Imperial court were imprisoned. In August, after a proposed constitution creating a constitutional monarchy was presented to the emperor, the Derg began a program of dismantling the imperial government in order to forestall further developments in that direction.