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Wikipedia Overview

The Battle of Muddy Flat, also called the Battle of Nicheng (泥城之戰) by the Chinese, was a small land/naval battle on the borders of the Shanghai Concession areas of what would later become the Shanghai International Settlement between a British, American, and Small Swords Society alliance and units of the Qing Imperial forces with a fleet of mercenary allies on April 3–4, 1854. The battle took place during the Small Swords Society uprising, which was part of the Taiping Rebellion, but before the Second Opium War. Qing forces began harassing foreigners around the foreign concessions in part due to individual foreigners trading with Taiping forces, who had just taken over the Old City of Shanghai the previous year. Skirmishes began on April 3 and the defending Shanghai Volunteer Corps "S.V.C." called for more direct military aid. An amphibious landing by U.S. and British Marines and Sailors took place the next day, and the battle began soon after, resulting in a joint Anglo-American victory. The battle is significant in solidifying the military ability and determination of foreigners to maintain their power in their concessions in the eyes of both the Taiping and the Qing. The battle also marked the first time that American and British military forces worked together in a land battle, as opposed to their joint 1800 naval battle in Curaçao during the Quasi War and War of the Second Coalition.