Small Swords Society or Small Sword Society was a political and military organisation active in Shanghai, China, and neighbouring areas amid the Taiping Rebellion, between about 1840 and 1855. Members of the society, rebelling against the Qing dynasty, occupied old Shanghai and many of the surrounding villages. Chinese gentry and merchants took refuge in the British and French concessions, which were regarded as the only safe places. The rebels briefly allied with the British and American forces in the concessions after Qing forces attacked the concessions during the Battle of Muddy Flat. The rebellion was suppressed and the society expelled from Shanghai in February 1855.