Each of the five Segmenta Majoris centres on a fortress and its logistical system, with sectors and subsectors below it. A battlefleet combines capital ships, escorts, transports, orbital defences, and patrol vessels rather than being only a line of battleships. The built-in tension between the naval commander and senior administrator impedes simple autocracy, even if it can complicate operations. Subsector boundaries follow the practical patrol range of warships, making geography and endurance more important than tidy administrative shapes.
Notable Point · 27:36-33:57
Segmenta, sectors, and divided command
The Imperium's five segmenta and nested sectors turn impossible distances into a hierarchy of fleets, fortresses, and checks on power.