annotation in Sanguozhi vol. 25. (諸將或問公曰：「初，賊守潼關，渭北道缺，不從河東擊馮翊而反守潼關，引日而後北渡，何也？」公曰：「賊守潼關，若吾入河東，賊必引守諸津，則西河未可渡，吾故盛兵向潼關；賊悉衆南守，西河之備虛，故二將得擅取西河；然後引軍北渡，賊不能與吾爭西河者，以有...

by Li Zicheng. He defeated Li Zicheng at the Battle of Tongguan Nanyuan (潼關南原之戰) in 1638, after which Li fled with only 18 men. After that battle, he was...