Gleaves strength shrank sharply when measured as available escorts

The Gleaves class continued the alternating machinery arrangement with five 5-inch/38 guns, ten torpedoes, roughly 6,500 nautical miles of range, and a speed above 37 knots. A count from individual commissioning dates gives twenty-one ships by 7 December 1941, though other publications give eighteen and the discrepancy remains unresolved. A published total of twenty-three may include two ships commissioned later that month. Across all modern classes ordered before 1939, the tally used here is 86 of 155 destroyers in commission on that date. A rule of thumb that divides a force among deployed, maintenance, and training or transit states reduces 86 hulls to about 29 routinely available ships. For longer-distance operations, sustaining one ship forward could require five hulls, with the others undergoing maintenance, training, outward passage, and return passage. Three carriers could consume roughly twenty-four destroyers if each received an eight-ship screen, although carrier maintenance and adjustments to deployment cycles make this an illustration rather than a fixed allocation. The later order for 175 Fletcher-class destroyers illustrates the scale of wartime escort demand and American production. Fleet strength depended on deployable cycles and escort demand rather than the number printed in an authorization.