sentences:  The collapse of Japanese resistance has been attributed to lack of preparedness, due to changes in the command structure and to a lack of combat troops; many of the 11,000 men based there were administrative and support units.None of the senior officers present had been in post more than a few weeks and the senior air officer had been relieved following the destruction of his air forces at the beginning of April.Neither Kitazono nor Endo had been able to prepare a comprehensive defence plan, and in any event had neither the men nor the resources to carry it out.