The Battle of Boju () was the decisive battle of the war fought in 506 BC between Wu and Chu, two major kingdoms during the Spring and Autumn period of ancient China. The Wu forces were led by King Helü, his brother Fugai, and Chu exile Wu Zixu. According to Sima Qian's Shiji, Sun Tzu, the author of The Art of War, was a main commander of the Wu army, but he was not mentioned in the Zuo Zhuan and other earlier historical texts. The Chu forces were led by Lingyin (prime minister) Nang Wa (also known as Zichang) and Sima (chief military commander) Shen Yin Shu. The Wu were victorious, and captured and destroyed the Chu capital Ying.