Separate Roman commands on the Danube supported campaigning beyond the frontier as well as defence along it. The Classis Pannonica and Classis Moesica had to sustain logistics, raids and reconnaissance across an enormous river system. In this interpretation, their consolidation into the Classis Histrica accompanied the empire's retreat from offensive operations. One fleet was a poor substitute for separate commands along nearly 3,000 kilometres of river. The winding course added to the distance and difficulty of supporting operations across the whole system.
Chapter · 20:18-35:57
Roman Danube fleets and the demands of offensive war
Consolidating two Roman Danube fleets into one is interpreted as a retreat from offensive campaigning and a poor fit for the river's length.