Finally read through all the posts and the result is the same: DC has had more international and league success than any other team in the league. The fact that this question only occurs because Chicago is going for the treble means that if Chicago had not won at least one of those titles, nobody would be asking this question. A good year does not make you the best club in the league's history. Consistency and numerous titles on multiple platforms do. Yes, Chicago has had success over the last few years, but it doesn't come close to what DC accomplished in its first 4 years. Chicago is competing for its 2nd league title in five years. By this time, DC had already won three. That alone speaks volumes about what each team has accomplished. However, it is far too early to say that any team in MLS is a dynasty. The League simply hasn't been around long enough to make such a conclusion. Yet, to say that DC is the best in the League's history is a fact. They are the only club to win 3 titles, much less two (though that changes on Sunday). However, the rest of the League has some catching up to do if the want to challenge DC's legacy.