The Battle of Hanzhong (漢中攻防戦) entails a series of conflicts fought in the Hanzhong area between Cao Cao and Zhang Lu, then later Liu Bei and Cao Cao. Both vied for the land to expand their respective territories. In the first battle, Cao Cao aimed to take Hanzhong due to its strategic value in attacking the Chengdu. Shortly after Zhang Lu's surrender, Liu Bei patched an agreement with Sun Quan on a two pronged attack on Wei, with Liu Bei attacking Hanzhong and Sun Quan attacking Hefei. Most titles tend to focus on Battle of Mt. Dingjun, which was a part of the power struggle in the area.