 The term, World Series of Soccer, was originally used for a series of senior international soccer matches hosted by the United States Soccer Federation between 1991 and 1994.In 2005, Major League Soccer re-introduced the name for a series of professional matches in the United States

In 2005, Major League Soccer (MLS) began the World Series of Soccer (WSS), a series of games pitting MLS and big name international clubs against each other.The games took place across the United States.