The Second Siege of Jinju was a battle during 1593 in Hideyoshi's invasions of Korea at Jinju Fort, Korea, between Japan and Korea. Unlike the First Siege of Jinju this battle resulted in a Japanese victory. The Koreans defended the castle desperately with various weapons including bows, handguns, "black" class cannons (hyeonja-chongtong), explosive shots fired from mortars, killing numerous Japanese soldiers and destroying towers and bamboo palisades. The Koreans resisted for ten days, until a section of wall was breached by Japanese sappers, who had hid in an armoured cart called a "tortoise shell cart". This became the origin of the Uwajima Ushi-oni Festival. The fortress was captured with the loss of the garrison commander, Hwang Jin, and all of his defenders and civilians.