On January 29, 1598, allied forces of Ming and Korea consisting of 56,900 soldiers attacked Ulsan Waeseong (Japanese style castle), just before its completion, and began a siege.
12月22日、完成直前の蔚山倭城（日本式城郭）を明・朝鮮連合軍5万6,900人が襲撃し、攻城戦を開始した。