1920年7月爆发的“直皖战争”,是袁世凯死后北洋军阀在各帝国主义支持下分为不同派系而爆发的第一次军阀大混战。战争仅经短短几天,即以皖系的失败而告终,北京军阀政府遂由皖系暂转为直、奉两系所统治。皖系失败的原因是多方面的,但其主将曲同丰在关键战役中被俘投降,则是重要的原因之一。曲同丰,山东省福山县人。1904年毕业于日本陆军士官学校后,先后任陆军速成学堂教练官、正监督及云南新军标统带、协统领。辛亥革命爆发,曾出任云南革命军军务部长兼第二师长,后弃职北归,改任南京临时政府北洋招抚使。1912年以后历 The “Direct Anhui War” that broke out in July 1920 was the first warlord melee that broke out after the Northern Yuan Warlord Prince Yuan Shikai’s death with the support of various imperialists. Only a few days after the war broke out, the failure of the Anhui Department ended. The warlord government in Beijing was temporarily put down by the Wan-wan Department and ruled by the two departments. There are many reasons for the failure of Anhui Province, but it is one of the important reasons why its leader, Qu Tongfeng, was captured and surrendered during the key battles. Qu Tong Feng, Fu Shan County, Shandong Province. After graduating from Japan’s Army Officer School in 1904, he served as a coaching officer at the Accelerated Academy and was supervising and supervising the Yunnan New Army’s standard system belt. Xinhai Revolution broke out, served as Yunnan Revolutionary Army military minister and second division director, then renounced North return, replaced by the Northern Provisional Government of Northern Pacification. Calendar after 1912