From November 1938, the 13th Division was assigned to the Japanese Eleventh Army and remained in China throughout the Pacific War, participating in numerous campaigns and battles, notably the Battle of Zaoyang–Yichang, Battle of West Hubei and Battle of Changde. A particularly heavy Chinese attacks in Yichang were repulsed in October 1941 with the extensive use of chemical weapons by "13th division". In December 1942, the 58th infantry regiment was transferred to the 31st division, and "13th division" has become a triangular division.