The 1982–83 campaign was the greatest in the history of the club, and Strachan made his mark early on with four goals in a 5–1 victory at former club Dundee in the League Cup. Despite only finishing third in the league (albeit only one point behind champions and New Firm rivals Dundee United) and exiting the League Cup in the quarter-finals, Aberdeen won the Scottish Cup and the European Cup Winners' Cup. The club's European success came with a 2–1 after-extra-time victory over Spanish giants Real Madrid at Ullevi in Gothenburg. The Scottish Cup came with a 1–0 win over Rangers. The "Dons" continued their success by delivering the league title and Scottish Cup in 1983–84, with Strachan setting up Mark McGhee for the winning goal in the cup final win over Celtic. This completed a unique treble, as they defeated Hamburger SV in the 1983 European Super Cup.