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In the first battle of the Warlord Rebellion in northeastern Shandong against the Nationalist government of China, a 24,000-strong rebel force led by Zhang Zongchang was defeated at Zhifu by 7,000 NRA troops.

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Warlord Rebellion in northeastern Shandong
1929 uprising in the Republic of China
The Warlord Rebellion in northeastern Shandong was an uprising of several allied Chinese warlord armies under the leadership of Zhang Zongchang in 1929. The rebels wanted to regain their former territories in Shandong from Liu Zhennian, the man who had defected from Zhang to the…Source: Wikipedia (CC BY-SA)
Nationalist government
Government of China from 1925 to 1948
The Nationalist government, officially the National Government of the Republic of China, refers to the government of the Republic of China from 1 July 1925 to 20 May 1948, led by the nationalist Kuomintang (KMT) party.Source: Wikipedia (CC BY-SA)
February 21
Day of the year
February 21 is the 52nd day of the year in the Gregorian calendar; 313 days remain until the end of the year.Source: Wikipedia (CC BY-SA)