Yang Chengwu launched a strong attack on the Dongtuan Fort.

In the 1940 'Hundred Regiments Offensive', Yang Chengwu, commander of the First Division of the Jin-Cha-Ji Military Region, led his troops to eliminate over 170 Japanese soldiers of a training unit in Dong Tuanbao, Laiyuan County, achieving victory in the assault. After the Japanese army retook Dong Tuanbao, they erected a stone monument at the village entrance to honor their fallen officers, inscribing a poem from 'Song of Everlasting Regret' on both sides in Japanese and Chinese. The poem includes the line 'One death leaves regret and cannot destroy the Eighth Route Army,' expressing the Japanese army's resentment over their defeat at Dong Tuanbao. The invading Japanese forces set up a special outpost in Dong Tuanbao, Laiyuan, Hebei, which was actually a training unit with 170 members, all experienced Japanese officers and sergeants imbued with the spirit of Bushido. They were well-equipped and well-supplied with ammunition. The outpost was situated in a strategically advantageous location, easy to defend and difficult to attack, making it a tough nut to crack among the Japanese positions in the surrounding area. After the Hundred Regiments Offensive, as the Jingxing battle was nearing its end, Yang Chengwu had set his sights on Dong Tuanbao, this tough target. This commander, humorously dubbed a 'warmonger' by Commander Nie Rongzhen with the quip that 'his hands itch if there is no battle for three days,' hurried to the front lines to survey the terrain and convened cadre meetings above the battalion level to discuss the assault plan. Inside the Dong Tuanbao outpost, the Japanese forces were transitioning between new and old...