The allied army, number 29,500 men, laid siege to Tosan near
Ulsan in late October. The fortress was too heavily fortified to attempt an assault, however a series of engagements did occur around the area, resulting in more than 2,000 Japanese casualties. Allied forces lifted the siege on 2 November.
Katō Kiyomasa's men departed for
Japan on 14 December 1598.[3]
Swope, Kenneth M. (2006), "Beyond Turtleboats: Siege Accounts from Hideyoshi's Second Invasion of Korea, 1597–1598", Sungkyun Journal of East Asian Studies, 6 (2): 177–206
Swope, Kenneth M. (2005), "Crouching Tigers, Secret Weapons: Military Technology Employed During the Sino-Japanese-Korean War, 1592–1598", The Journal of Military History, 69: 11–42,
doi:
10.1353/jmh.2005.0059,
S2CID159829515
Swope, Kenneth M. (December 2002), "Deceit, Disguise, and Dependence: China, Japan, and the Future of the Tributary System, 1592–1596", The International History Review, 24 (4): 757–1008,
doi:
10.1080/07075332.2002.9640980,
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Swope, Kenneth M. (2009), A Dragon's Head and a Serpent's Tail: Ming China and the First Great East Asian War, 1592–1598, University of Oklahoma Press