During the early years of the Pacific War, Truk Atoll in the Caroline Islands had been an important base for the Imperial Japanese Navy (IJN), using facilities which had been constructed there before the outbreak of hostilities.
Nos primeiros anos da guerra do Pacífico o atol de Truk nas Illas Carolinas fora unha base importante da Armada Imperial xaponesa, usando instalacións construídas antes do comezo das hostilidades.