《三国志·魏书·乌丸鲜卑东夷传》
建安十一年，曹操亲自在柳城出征攻打蹋顿，秘密行军，还未行到一百里，被敌军发现。
建安十一年，太祖自征蹋顿于柳城，潜军诡道，未至百余里，虏乃觉。
In the 11th year of Jian'an, Cao Cao personally led an expedition from Liucheng to attack Taton. He marched secretly, and before he had traveled a hundred miles, the enemy discovered him.