In the spring of 231, Zhuge Liang finally met his nemesis, Sima Yi (the newly appointed Wei commander), at the Battle of Mount Qi, the deadliest campaign of the five expeditions in terms of death toll. In late 234, Zhuge Liang and Sima Yi reached a stalemate at the Battle of Wuzhang Plains. Straining his energy on military matters big and small, Zhuge Liang fell seriously ill and eventually died in camp at the age of 53. Before his death, Zhuge Liang recommended Jiang Wan and Fei Yi to succeed him as regent of Shu. He was buried on Mount Dingjun according to his dying wish and posthumously granted the title Marquis Zhongwu (忠武侯; literally loyal and martial marquis) by Liu Shan.