美国防部称上述变动是所谓"驻外美军重新部署计划"的组成部分，目的是更灵活机动地把军队部署到全球更急需的地区。
The US Defense Department justifies this change as part of the so-called "Global Posture Review" that it has been carrying out to provide more flexibility and mobility in deploying troops to more urgently needed places around the world.