A question and reply between Rome and Britain could consume more than three weeks before orders even began to move. Septimius Severus's closer position during the crisis of AD 193 gave him a decisive communications advantage over rivals in Britain and Syria. A local fleet similarly raised the threshold for attack and could respond within days, whereas rebuilding or redeploying a force after warning might take months. Forces already present also made an enemy buildup larger, slower, and easier to detect before a crisis became irreversible. These delays explain why short-term savings from disbanding a fleet could impose far greater costs when an empire later had to recreate capability under pressure.
Notable Point · 56:57-1:00:47
Slow communications made local fleets strategically decisive
When imperial messages took days and reinforcements took months, forces already on station determined whether Rome could shape a crisis early.