About D.C. United (from Wikipedia)
D.C. United is an American professional soccer (association football) club based in Washington, D.C. which competes in Major League Soccer (MLS). It is one of the ten charter clubs of MLS, having competed in the league since its inception, in 1996.
Over the club’s history, D.C. United has been considered to be the flagship franchise of MLS, having won 12 international and domestic titles. Domestically, United has been one of the most successful MLS clubs. United has won the U.S. Open Cup twice, and holds an MLS record for most MLS Cup and Supporters’ Shields apiece, winning each honor four times. United was the also the first club to win both the MLS Cup and MLS Supporters’ Shield consecutively.
On the international stage, D.C. United has competed in both the CONCACAF Champions League and its predecessor, the CONCACAF Champions’ Cup. The club is also the only American soccer club to ever compete in a CONMEBOL (South American) competition, participating in the 2005 and 2007 editions of the Copa Sudamericana. In 1998, the club won the CONCACAF Champions’ Cup. Subsequently, United won the now-defunct Copa Interamericana, a competition between the CONCACAF on CONMEBOL champion that year to determine the best soccer club in the Americas. In the 1998, and final edition of the Copa Interamericana, D.C. United defeated Vasco da Gama of Brazil to take the title.