USS Union (1846)
The second USS "Union" was a schooner that served in the United States Navy briefly during the Mexican War. "Union" was serving as a Mexican schooner when the U.S. Navy steam screw corvette captured her off Tampico, Mexico, on 14 November 1846. She entered U.S. Navy service later that month with Lieutenant John Ancrum Winslow in command. Poorly equipped, "Union" was wrecked on a reef off Veracruz, Mexico, on 16 December 1846.