The Battle of Big Sandy Creek was fought in northwestern New York on May 29–30, 1814, during the War of 1812. American troops and Oneida Indians launched an attempted surprise attack on British troops and sailors, who were pursuing them inland from Lake Ontario. With the loss of a boat, and its subsequent discovery by British forces, the Americans lost the element of surprise prior to the battle. Nevertheless, the strategy was still implemented successfully, forcing the entire British force to surrender and ending their advance.