Yang Hao, Ma Gui, and Gwon Yul met up at Gyeongju on the 26 January 1598 and marched on Ulsan with an army of 50,000.

[1] The battle began with a false retreat that lured the Japanese garrison into a frontal attack.

The allies assaulted the inner fortress, at one point even taking a portion of the wall, but suffered heavy casualties.

[4] According to Hawley, the Japanese garrison at Ulsan Castle numbered 10,000 men, with less than 1,000 surviving the siege.

[4] Yang Hao would ultimately be called back to Beijing for his failure at Ulsan on 12 August 1598.