Meanwhile, on the coast at dawn of 29 July, the IJA 5th Division and Japanese naval forces separately attacked Tianjin and the port at Tanggu, which were defended by units of Chinese 38th Division and volunteers under acting commander Liu Wen-tien. General Huang Wei-kang's brigade defended the Taku Forts gallantly and also attacked a nearby Japanese airfield, destroying many aircraft. However, with increasing Japanese reinforcements his position was untenable, and that night (30 July) General Zhang Zizhong was ordered to withdraw toward Machang and Yangliuching south of Tianjin, abandoning the city and Taku Forts to the Japanese.