《明史·志·卷六十五》
在南方的京营，永乐年迁都北方时，开始任命中府掌府事官为南京守备，调度约东在南方的各个卫、所。
京营之在南者，永乐北迁，始命中府掌府事官守备南京，节制在南诸卫所。
In the Beijing camp in the south, when the capital was moved to the north during the Yongle reign, the officials of the Palace Staff Administration began to be called Nanjing Imperial Guards, who controlled and gave orders to the various local garrisons and military outposts in the south.