When Qadan (Kadan) stationed his forces in Wonju, 50 Mongol cavalrymen raided near Chiak Castle to steal cattle and horses.

Scholar-soldier Won Chung-gap led just 6 infantrymen, chased them down, and seized 8 enemy horses.

Later, enemy generals Torado, To'ena, and Boral returned with 400 soldiers and were thrilled to loot the city's government grain.

Won Chung-gap and a 7-man squad scouted the scene. Suddenly, one of the men, Joong-san, charged straight into the middle of the 400 enemy troops, decapitated one, and chased the rest past the outer gates.

The panicked Mongol forces fled, abandoning their horses, allowing the 7-man squad to capture 25 saddled horses.

Defense Commander Bok Gyu was overjoyed and gave all the captured horses to the squad.

— Essentials of Goryeo History (Goryeosa Jeoryo), February 15, 1291