An American deputy and a Manila coalition headquarters

Who might receive the senior United States Navy appointment in the coalition?

Possibly Chester Nimitz as an American deputy or senior subordinate, with the command structure likely divided between theatre and fleet responsibilities.

The British choice of a supreme commander could be balanced by an American deputy, with a separate fleet commander serving below the theatre leadership. Chester Nimitz is offered as a possible American appointment rather than a certain choice. Manila would place headquarters far enough from Japan to reduce immediate danger while remaining close enough to coordinate Pacific operations. Coalition command requires both operational competence and negotiated national representation.