During the Beiyang warlord melee, the three eastern provinces were gradually controlled by Zhang Zuolin, who was born of horse bandits, and with his set of handling of human feelings, Zhang Zuolin slowly integrated the resources of the northeast, not only established the Northeast Arsenal, but also cultivated a large number of talents of the three armies, becoming the first warlord unit with three armies at that time.
Zhang Zuolin with the strength of his soldiers, his ambition is also constantly expanding, in order to be able to chase deer in the Central Plains, occupy more territory, he did not hesitate to cooperate with the Japanese, in the northeast to open up a lot of privileges for the Japanese army, under the support of the Japanese army Zhang Zuolin's power is getting bigger and bigger. Eventually, he controlled the military and political power of the seven provinces.
Zhang Zuolin's behavior was dissatisfied by other warlords, and the direct troops who had been fighting with him were gradually annexed by him, and Zhang Zuolin began to confront new opponents, and the most feared of them were the Northern Expeditionary Army and Feng Yuxiang's troops, which were not only very powerful in combat, but also no less numerous than Zhang Zuolin.
In particular, Feng Yuxiang, his early experience and Zhang Zuolin have a lot of similarities, and Feng Yuxiang has always coveted The Beijing and Tianjin occupied by Zhang Zuolin, so he did not launch an attack on the Feng army, but the two sides did not get any advantage in coming and going, until Feng Yuxiang joined forces with the Northern Expeditionary Army and Yan Xishan's troops to comprehensively attack the areas occupied by the Feng army, and only then did the situation change.
Just when the three forces continued to attack the forces of the Feng Army, Zhang Zuolin was killed by the Bomb Attack of the Japanese army in Huanggutun, at this time, Feng Yuxiang and Yan Xishan not only did not rejoice, but somewhat regretted what they had done before. In fact, this is the complexity of human nature.
First of all, Yan Xishan and Feng Yuxiang, like Zhang Zuolin, are veteran warlord forces, and in the process of fighting, they have an unwritten rule, that is, they do not kill officers above the commander level, so that they can take care of each other when they lose their power, but this time they caused Zhang Zuolin to be killed by the Japanese, and Feng Yuxiang and Yan Xishan inevitably had some feelings of pity for each other.
Secondly, Feng Yuxiang and Yan Xishan and Chiang Kai-shek did not have the same heart, they were worried about "cunning rabbit death, running dog cooking", the Northern Expeditionary Army was huge at that time, even the powerful Feng army collapsed in front of him, Yan Xishan and Feng Yuxiang still wanted to take advantage of the war to want to get more benefits, did not expect Zhang Zuolin to be killed, resulting in the collapse of all the Feng clan and shrinking in Guannei. This led to Chiang Kai-shek being able to clean up the two of them without scruples, and Feng Yuxiang would naturally not be happy in this situation.
Feng Yuxiang and Yan Xishan did not have the ability to defeat Chiang Kai-shek at that time, so they still wanted to win Zhang Zuolin into the final rebellion, and as a result, Zhang Zuolin died and the Northeast Army was leaderless, and although Feng Yuxiang and Yan Xishan gained some benefits, they would definitely become Chiang Kai-shek's targets in the future, so they regretted it very much.
After that, as the two of them expected, after fengshi fully indented into the Kwantung, Chiang Kai-shek began to attack the two of them, although there was no direct outbreak of hot war, but Chiang Kai-shek wanted to disarm and reorganize the army, unwilling to let their strength be damaged Yan Xishan and Feng Yuxiang declared independence, and the Central Plains War broke out, and to their surprise, Zhang Xueliang accepted Chiang Kai-shek's invitation and led 100,000 northeast troops into the customs to help Chiang Kai-shek, and Feng Yuxiang and Yan Xishan, who were not Chiang Kai-shek's opponents, could only accept the reality of defeat.