The peak of the rivalry was arguably during the inter-war years and just after, when matches between the sides were always among the most popular (and most highly attended) on the fixture calendar. While both clubs were largely unsuccessful until the 1960s, they have since drifted apart and the significance of matches between them has correspondingly declined. Chelsea enjoyed successful spells during the 1960s and 1970s, and again from the mid-1990s to the present day, while Fulham spent much of that period in the lower divisions of the Football League.