After the Northeast Army withdrew to Guannei in 1931, the main force of the Northeast Army was sent to Jiangxi and Shaanxi to kill the Red Army. However, the repeated defeats of the Northeast Army, coupled with homesickness, also contributed to the subsequent Xi'an Incident to a certain extent.
However, after the Xi'an Incident, Zhang Xueliang, the leader of the Northeast Army, was placed under house arrest by Lao Jiang, and the Northeast Army was suddenly leaderless. At this moment of crisis, there is one person who has no hesitation in taking on the burden of leading the Northeast Army, and this person is Yu Xuezhong.
After the Yang Yuting incident, Zhang Xueliang was bent on cultivating officers loyal to him, most of whom were born in the Northeast Daowu Tang and had a relationship with Zhang Xueliang as a master and disciple, including the later Huang Xiansheng, Chang Endo, and others. Although Yu Xuezhong was from Wu Peifu's old direct line, he was also appreciated by Zhang Xueliang, only because he could fight a good war.
After the fall of Rehe in the September 18 Incident, the Japanese army invaded Our territory in North China under various pretexts, and the traitor Yin Rugeng bribed the traitors and established a puppet army in the "armistice zone" established by the Japanese. Therefore, Yu Xuezhong drew backbone cadres from the Northeast Army, and then organized special police to confront the Japanese and pseudo-Japanese.
Relying on the extraterritorial jurisdiction of the Japanese, the Japanese rogue agents beat up Chinese in the Hiratsu area and rampaged through the military zone of our army. Yu Xuezhong's righteous words were not humble, on the one hand, the Japanese had no loopholes to find faults, and on the other hand, they defended national sovereignty.
The Japanese were unwilling and bribed the chef to poison him, but yu Xuezhong found out at a glance. The Japanese bribed the killer to assassinate him in secret, but was also thwarted by the Hiratsu police. Before the July 7 Incident, the Japanese hated Yu Xuezhong and hated it with itchy teeth.
After the Xi'an Incident, Zhang Xueliang was placed under house arrest by Chiang Kai-shek. At this time, all the Northeast Army was under the command of Yu Xuezhong. After the outbreak of the All-out War of Resistance, Yu Xuezhong served as the commander of the Sulu Theater. Although he was called commander, the only people he could mobilize under his command were the 51st and 57th Armies of the Northeast Army.
The Sulu Theater was close to the core japanese rule belt of Nanjing, and the main Japanese divisions were swept away very wildly. The Sulu Theater organized militias, trained regular troops, built arsenals, and stubbornly survived behind enemy lines. As a guerrilla theater behind enemy lines, most of the Nationalist troops in the Jicha Theater committed traitors, but thanks to yu Xuezhong's leadership, the Sulu Theater stubbornly survived. It was not until 1944, when the Japanese launched Operation One, that the Sulu Theater was forced to abandon. In guerrilla warfare behind enemy lines, Yu Xuezhong scored good results.