Union is the thirteenth studio album from the English progressive rock band Yes, released in April 1991 on Arista Records. Production began in 1990 following the amalgamation of two bands featuring current and previous members of Yes at the time—Yes, formed of Chris Squire, Trevor Rabin, Tony Kaye, and Alan White and Anderson Bruford Wakeman Howe (ABWH), formed of Jon Anderson, Steve Howe, Rick Wakeman, and Bill Bruford. The album is a collection of tracks written by each group separately; the eight members do not play together at once.