The two Japanese destroyers were making a routine logistics run because suitable fast supply ships and closer support infrastructure were unavailable. A purpose-built fast transport escorted by destroyers would have preserved the combat ships' fighting role, while a nearer depot would have shortened the exposed journey. Kolombangara's volcanic terrain made it defensible but awkward to supply on the side facing Allied forces. The geography offered no easy route across the island from a safer harbor to the airfield. Crete provides a comparison: the main harbor's location on the exposed side complicated Allied resupply and evacuation. Japan was therefore forced to carry cargo in valuable warships through contested waters instead of using those ships as escorts.
Chapter · 2:11:03-2:13:43
Destroyer supply runs reveal Japan's logistics trap
Using destroyers as transports solved an immediate supply problem while exposing scarce combat ships to losses they could not replace.