Japan. - Armies of the world The Japanese mastery of Korea: the advance towards the Yalu. Japanese troops proceeding towards Ichon: coolies bearing compressed fodder. - The Japanese mastery of Korea: … The crossing of the Yalu: the Japanese succes at Kiu-Lien-Cheng, and types of the victorious troops (1). Building the road to victory: the path across the rice-fields for the Japanese army in Korea.