Why Britain needed many cruisers

Cruisers made a dispersed navy present in many places at once. Britain expected a future war to span the Atlantic, Mediterranean, Indian Ocean, and Pacific, so it needed enough ships both to keep its own traffic moving and to threaten an opponent's. Older C-, D-, and E-class cruisers still formed the interwar backbone, but their First World War origins limited what modernization could deliver. The treaty system made it impossible to build overwhelming battle fleets for every theatre, so cruiser numbers became central to an affordable global posture. The point is less about winning a single fleet action than sustaining the wider maritime war by protecting money, goods, personnel, and equipment in transit.