 During the Second Sino-Japanese War, this pass was contended between the Japanese and the Chinese in the Battle of Kunlun Pass.In 1939, a heavy battle between Chinese and Japanese forces broke out at Kunlun Pass, with both sides engaging their respective elite forces and best firearms.The battle bore strong significance in the direction of the war because it might result in the total control of China by Japan or the safety of its material supply chain by China.