Since the 1969 expansion, the Yankees have played in the Eastern Division of the American League. The Yankees have been Major League Baseball's most dominant franchise. No team has won more pennants or World Series, and many of the game's biggest stars have been Yankees. The Yankees also have more championships than any other top league professional team.

One of the American League's eight charter franchises, the Yankees have been among the most storied teams in North America over their 100+ year history. Along with franchises like the Boston Celtics and Montreal Canadiens, the Yankees have helped exemplify the phrase "dynasty" in professional athletics.

The Boston Red Sox are the Yankees' chief rivals, with the Yankees-Red Sox rivalry often considered one of the most heated rivalries in all of American professional sports. The Yankees lead the league in total titles and the overall series.  Wikipedia.