February – Guangzhou government forms an alliance with Zhang Zuolin and Duan Qirui against Wu Peifu.
March - Guangzhou government launches unsuccessful attack to the north.
April - First war between the Zhili (Wu Peifu) and Northeast (Zhang Zuolin) factions begins.
May – Wu Peifu defeats Zhang Zuolin and gains control of Beijing.
May – Wu Peifu and Zhang Zuolin sign a peace agreement.
June - Zhang Zuolin announces autonomy of Manchuria (Northeast).
June – With the support of Wu Peifu, Li Yuanhong resumes his role as president of the Beijing government. Wu now controls a territory that covers fifteen provinces and districts.
June – The Chinese Communist Party announces a willingness to form an alliance with the Nationalist Party to form a united front.
June – Cheng Jiongming demands the resignation of Sun Yat-sen. Chen’s troops attack Sun Yat-sen’s presidential residence in Guangzhou. Sun escapes to a gunboat moored near the British concession. Chiang Kai-shek joins him on the gunboat. Chen gains control of Guangdong province.
August – A British warship takes Sun Yat-sen and his party to Hong Kong and then onto Shanghai.
August – Russian representative Aldof A. Joffe arrives in Beijing. Russia wants diplomatic recognition from Beijing. In return, Beijing government wants the Red forces to leave Outer Mongolia.
August – Communist Party members Chen Duxiao and Li Dazhao are admitted into the Nationalist Party. More Communist members are admitted later.
September – Sun Yat-sen tells a Russian envoy that he wants to establish an army with Russian arms.
December - The Soviet Union formally comes into being. Soviet Russia signs treaty with three republics: Belorussia, Ukraine, and the Transcaucasian Soviet Federated Socialist Republic to form the USSR.