湯恩伯
In Operation Kogo, 390,000 Chinese soldiers, led by General Tang Enbo (), were deployed to defend the strategic position of Luoyang. The 3rd Tank Division of the IJA crossed the Yellow River around Zhengzhou in late April and defeated Chinese forces near Xuchang, then swung around clockwise and besieged Luoyang. Luoyang was defended by three Chinese divisions. Japan's 3rd Tank Division began to attack Luoyang on May 13 and took it on May 25.