Allied fleet deployment used coalition specialization. Britain was already heavily committed in the Atlantic and European theaters, so the United States could concentrate new effort in the Pacific. Building duplicate British and American forces in both regions would have wasted time and resources. The arrangement distributed global burdens across allied navies.
Notable Point · 1:48:09-1:48:37
Allied fleets avoid duplicating theater commitments
A force-allocation answer explains why Britain remained concentrated in the Atlantic-European theater while the United States built its main additional effort in the Pacific.