Yong-le: Year 6, Month 6, Day 19
12 Jul 1408
The Directorate of Astronomy memorialized that the heavenly portents indicated that external yi were going to attack the borders. There were Imperial orders requiring that..... The Ning-yang Marquis Chen Mao and the Vice Commissioner-in-chief Han Guan, regional commander of Guang-xi, guard Jiao-zhi... and that they train and ready troops and horses and carefully guard the border areas.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 1072