The Beiyang Army (), named after the Beiyang region, was a large, Western-style Imperial Chinese Army established by the Qing dynasty government in the late 19th century. It was the centerpiece of a general reconstruction of Qing China's military system. The Beiyang Army played a major role in Chinese politics for at least three decades and arguably right up to 1949. It made the Xinhai Revolution of 1911 possible, and, by dividing into warlord factions known as the Beiyang Clique (), ushered in a period of regional division.
The Beiyang Army had its origins in the Newly Created Army established in late 1895 under Yuan Shikai's command, which rapidly expanded after 1901 with new recruits and by incorporating other forces. By 1906 it had six divisions and was the most advanced army under the command of the Qing dynasty.
The beginning of the Beiyang Army could be traced back to Li Hongzhang's Huai Army, which was raised to quell the Taiping Rebellion. Unlike the traditional Green Standard or Banner forces of the Qing, the Huai Army was largely a militia army based on personal, rather than institutional, loyalties. The Huai Army was at first equipped with a mixture of traditional and modern weapons. Its creator, Li Hongzhang, used the customs and tax revenues of the five provinces under his control in the 1880s and 1890s to modernize segments of the Huai Army, and to build a modern navy (the Beiyang Fleet).
It is around this time that the term "Beiyang Army" began to be used to refer to the military forces under his control. The term, meaning literally "Northern Ocean", refers to the customs and excise revenues collected in the Beiyang region (the northern coastal provinces of Zhili, Shandong and Liaoning, surrounding the imperial capital of Peking), which were used first to fund the Beiyang Fleet and later the Beiyang Army. However, funding was usually irregular and training by no means systematic. By the early 1890s, these modernized units established by Li Hongzhang that were known as the Beiyang Army were the best military forces that the Qing dynasty could field.