C. Marshall, the "architect of victory" in World War II when he was the United States Army Chief of Staff, served at Tientsin in the 1920s as Executive Officer of the 15th Infantry. The US withdrew this unit in 1938 and a US presence was maintained only by the dispatch of a small US Marine Corps contingent from the Embassy Guard at Beijing.
Tianjin Flood in 1939.
On July 30, 1937, Tianjin fell to Japan, as part of the Second Sino-Japanese War, but was not entirely occupied, as the Japanese for the most part respected foreign concessions until 1941, when the American and British concessions were occupied. In the summer of 1939, there occurred a major crisis in Anglo-Japanese relations with the Tientsin Incident. On June 14, 1939, the Imperial Japanese Army surrounded and blockaded the British concession over the refusal of the British authorities to hand over to the Japanese six Chinese who had assassinated a locally prominent Japanese collaborator, and had taken refuge in the British concession. For a time, the 1939 crisis appeared likely to cause an Anglo-Japanese war, especially when reports of the maltreatment by the Japanese Army of British subjects wishing to leave or enter the concession appeared in the British press. The crisis ended when the British Prime Minister Neville Chamberlain was advised by the Royal Navy and the Foreign Office that the only way to force the Japanese to lift the blockade was to send the main British battle fleet to Far Eastern waters, and that given the current crisis in Europe that it would be inappropriate to send the British fleet out of European waters, thus leading the British to finally turn over the six Chinese, who were then executed by the Japanese. During the Japanese occupation, Tianjin was ruled by the North China Executive Committee, a puppet state based in Beijing.
On August 9, 1940, all of the British troops in Tianjin were ordered to withdraw. On November 14, 1941 the American
