Chinese Civil War: The Communist forces take over Tianjin from the Nationalist government.

The Chinese Civil War was fought between the Kuomintang-led government of the Republic of China and the forces of the Chinese Communist Party (CCP). Armed conflict continued intermittently from 1 August 1927 until Communist victory resulted in their total control over mainland China on 7 December 1949.

The Communist Party of China (CPC), commonly known in English as Chinese Communist Party (CCP), is the founding and sole ruling party of the People's Republic of China (PRC). Founded in 1921, the CCP emerged victorious in the Chinese Civil War against the Kuomintang and proclaimed the establishment of the PRC under the chairmanship of Mao Zedong in October 1949. Since then, the CCP has governed China and has had sole control over the People's Liberation Army (PLA). As of 2024, the CCP has more than 100 million members, making it the second largest political party by membership in the world.

The Pingjin campaign, also known as the Battle of Pingjin and also officially known in Chinese Communist historiography as the Liberation of Beijing and Tianjin was part of the three major campaigns launched by the People's Liberation Army during the late stage of the Chinese Civil War against the Government of the Republic of China. It began on 29 November 1948 and ended on 31 January 1949, lasting a total of 64 days. This campaign marked the end of Nationalist dominance in the North China Plain. The term Pingjin refers to the cities Beiping and Tianjin.

Tianjin is a direct-administered municipality in northern China on the shore of the Bohai Sea. It is one of the nine national central cities, with a total population of 13,866,009 inhabitants at the time of the 2020 Chinese census. Its metropolitan area, which is made up of 12 central districts, was home to 11,165,706 inhabitants in 2015 and is also the world's 29th-largest agglomeration and 11th-most populous city proper.