In 1365–67, Zhu conquered the Zhang's state of Wu. Zhang attempted to attack in late 1364, before the enemy could exploit the potential of the newly conquered territories, but their offensive was repulsed in the spring of 1365. Before launching a final attack on the enemy's heartland, the Suzhou region, Zhu and his generals decided to first "cut off the wings" of Wu by occupying the territory north of the Yangtze and the Wu part of Zhejiang. Xu Da was appointed as the supreme commander of the attacking troops, and the plan was executed with ease due to the attacking army's superiority. The ten-month siege of Suzhou began in December 1366.
In 1365–67, Zhu conquered the Zhang's state of Wu. Zhang attempted to attack in late 1364, before the enemy could exploit the potential of the newly conquered territories, but their offensive was repulsed in the spring of 1365. Before launching a final attack on the enemy's heartland the Suzhou region, Zhu and his generals decided to first "cut off the wings" of Wu by occu,pying the territory north of the Yangtze and the Wu part of Zhejiang. Xu Da was appointed as the supreme commander of the attacking troops, and the plan was executed with ease due to the attacking army's superiority. The ten-month siege of Suzhou began in December 1366.