<page_title> Zhuge Liang's Northern Expeditions </page_title> <section_title> Xincheng Rebellion </section_title> <table> <cell> 21 Mar – 15 Aug 231 <col_header> Timeline of Zhuge Liang's Northern Expeditions </col_header> <col_header> Approximate date range </col_header> </cell> <cell> Fourth Northern Expedition: Cao Zhen dies sometime between 20 Apr and 18 May.Battle of Mount Qi: Zhuge Liang and Sima Yi engage in battle near Shanggui County and at Lucheng.17 July – 15 Aug: Zhuge Liang orders a retreat when his army runs out of supplies. <col_header> Timeline of Zhuge Liang's Northern Expeditions </col_header> <col_header> Event(s) </col_header> </cell> </table>
In 231, Zhuge Liang launched the fourth Northern Expedition and attacked Mount Qi.