Why the Royal Navy needed cruiser numbers

Sydney's loss to Kormoran often overshadows her successful Mediterranean service, which makes her a useful example of British cruiser policy. A global navy could not optimize solely for one-on-one cruiser combat. It needed enough ships to sustain coverage across many regions, whereas Japan expected an opponent to enter its own theatre. Treaty limits forced Britain to balance individual strength against the number of cruisers available for convoy, patrol, and fleet duties. The Town and Dido classes represented different attempts to meet the large-cruiser and numbers requirements that one design could not fully reconcile.