The 76ers went through a rebuilding period through the early 1970s, and came back to relevance during the 1976–77 season, in which they defeated the Celtics en route to a Finals appearance. Both teams would peak in the 1980s, with every single Eastern Conference Championship between 1980 and 1987 belonging to either the 76ers or Celtics. The Larry Bird-led Celtics won five of them, while the Julius Erving-led 76ers won the other three. The Charles Barkley-led Sixers of the later 1980s took the fight to the Celtics; however, neither team experienced much playoff success in the late 1980s, and both took steep nosedives in the Eastern Conference rankings throughout the 1990s.