 Complete the following phrase:  According to Dio, Bulla Felix operated an extensive intelligence network tracking travel and transport into the port at Brundisium and out of Rome. Bulla was a sophisticated and surprisingly educated leader, which helped him organise, plan and gather information on the size of parties making trips from and into Rome and what they were carrying. His band of 600 brigands included runaway slaves who had been mistreated, and a significant number of imperial freedmen, former slaves of the emperors household who would have been skilled or educated, and who had been cheated of their compensation. These imperial freedmen may have been ousted from privileged positions as a result of the 