The term China Marines, originally referred to the United States Marines of the 4th Marine Regiment, who were stationed in Shanghai, China from 1927 to 1941 to protect American citizens and their property in the Shanghai International Settlement, during the Northern Expedition and the Second Sino-Japanese War. Those Marines stationed at the embassy in Beijing and the consulate in Tianjin referred to themselves as North China Marines.

The Shanghai International Settlement originated from the merger in the year 1863 of the British and American enclaves in Shanghai, in which British and American citizens would enjoy extraterritoriality and consular jurisdiction under the terms of unequal treaties agreed by both parties. These treaties were abrogated in 1943.