1939-1945 20thcentury africa american amphibiousmotorvehicles amphibiousoperations amphibiouswarfare asia australia campaigns equipment history history(general) landingcraft militaryarmoredvehicles navaloperations newzealand operationalreadiness pacificarea planning unifiedoperations(militaryscience) unitedstates worldhistoryandhistoryofeurope worldwar worldwarii(1939-1945)