草亭秘议直皖战争和第一次直奉战争后,直系军阀控制了北京中央政权,直系军阀首领吴佩孚在北洋军阀中成为继袁世凯、段祺瑞以后的突出人物。就在第二次直奉战争一触即发的紧急关头,当时除孙中山、张作霖和卢永祥三角同盟之外,也形成了冯玉祥、胡景翼、孙岳等联合反吴的三角同盟,对吴佩孚构成了极大的威胁。一场政变在酝酿之中。冯玉祥看到北洋军阀的腐败常常流露出不满 Caoting secret meeting Direct Anhui war and the first straight after the war, direct warlord control of the central government in Beijing, direct warlord Wu Pei-fu in the Northern Warlords became Yuan Shikai, Duan Qirui prominent figure. At the critical juncture of the second Zhōngchong war, the Triangle alliance of Feng Yuxiang, Hu Jingyi and Sun Yue, except for the Triangle Alliance of Sun Yat-sen, Zhang Zuolin and Lu Yongxiang, formed a great threat to Wu Peifu . A coup is brewing. Feng Yuxiang saw the corruption of the Northern Warlords often show dissatisfaction