D.C. United is an American professional soccer 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. D.C. United has won 13 international and domestic titles or honors over the club's history. D.C. United was one of the most successful clubs in the early years of MLS, winning 8 of its 13 titles between 1996 and 1998 under head coach Bruce Arena. United holds an MLS record for most MLS Cup and Supporters' Shields apiece, winning each honor four times, and has won the U.S. Open Cup three times. United was also the first club to win both the MLS Cup and MLS Supporters' Shield consecutively.