In the spring of 1945, on the battlefield in Northeast China, the Japanese army retreated step by step. They decided to hand over the defense map of the Hulin Fortress, codenamed "Zhufeng", to the Hulin defenders. However, during transportation, they were ambushed by guerrillas and "Zhufeng" was lost. In order to retrieve "Zhufeng", the "Nanmu Army" under the Japanese Fourth Constitutional Corps responsible for escorting confidential documents was formed“
In the spring of 1945, on the battlefield in Northeast China, the Japanese army retreated step by step. They decided to hand over the defense map of the Hulin Fortress, codenamed "Zhufeng", to the Hulin defenders. However, during transportation, they were ambushed by guerrillas and "Zhufeng" was lost. In order to retrieve "Zhufeng", the "Nanmu Army" under the Japanese Fourth Constitutional Corps responsible for escorting confidential documents was formed“