In 1998, Dutchman Dick Advocaat became the club's first foreign manager.
Nine-in-a-row era stalwarts having moved on, Advocaat invested heavily in the team with immediate results, leading the club to their sixth domestic treble.
The league championship was won with a 3–0 victory at Celtic Park on 2 May 1999.
A second-consecutive league title was won by a record 21-point margin, the club securing a domestic double with a 4–0 Scottish Cup final victory over Aberdeen.
Rangers' campaign in the Champions League saw them defeat UEFA Cup winners Parma en route.

Advocaat's third season saw Rangers fail to compete domestically against Celtic under new manager Martin O'Neill.
Despite investment in the team, including Tore Andre Flo for a club-record £12 million, European success beyond the Champions League group stages again proved elusive.
After a slow start to the following season, Advocaat resigned from his post in December 2001 and was replaced by Alex McLeish.

In his first full campaign, the 2002–03 season saw McLeish become the sixth Rangers manager to deliver a domestic treble.
The championship was won on goal difference during a dramatic final day 6–1 triumph over Dunfermline Athletic at Ibrox, securing Rangers' 50th league title, the first club in the world to achieve the feat.
Major expenditure sanctioned by chairman David Murray had burdened Rangers with considerable debts in the region of £52m.
The club's worsening financial state saw many of the team's top players leave in the summer of 2003, the following season failing to deliver any trophies, only the second such occasion since 1985–86.

The 2004–05 season restored success to Rangers, who were boosted by signings such as Jean-Alain Boumsong, Dado Pršo and Nacho Novo, along with the return of former captain Barry Ferguson after a spell in England with Blackburn Rovers.
The club's league championship triumph culminated in a dramatic final-day finish.
The destination of the trophy changed unexpectedly, with Celtic conceding late goals to Motherwell at Fir Park whilst Rangers led against Hibernian, requiring the helicopter carrying the SPL trophy to change direction and deliver the prize to the Easter Road ground in Leith.

Despite beginning as favourites to retain the championship, Rangers suffered an unprecedented run of poor results between September and November, a club-record run of ten games without a win.
Included within this period, a 1–1 draw with Inter Milan took Rangers into the last 16 of the Champions League, the first Scottish team to achieve the feat since 1993, the club eventually exiting on the away goals rule to Villarreal.
On 9 February 2006, it was announced by David Murray that McLeish would be standing down as manager at the end of that season.

Frenchman Paul Le Guen replaced Alex McLeish as manager after season 2005–06.
The season started with an early exit from the League Cup whilst Celtic built a commanding lead at the top of the table.
In the UEFA Cup, Rangers became the first Scottish side to qualify for the last 32 of the competition, since the introduction of the group phase, after finishing their group unbeaten.
However, amid claims of disharmony between the manager and captain Barry Ferguson, it was announced on 4 January 2007 that Le Guen had left Rangers by mutual consent.
In 1998, Dutchman Dick Advocaat became the club's first foreign manager. Nine-in-a-row era stalwarts having moved on, Advocaat invested heavily in the team with immediate results, leading the club to their sixth domestic treble. The league championship was won with a 3–0 victory at Celtic Park on 2 May 1999. A second-consecutive league title was won by a record 21-point margin, the club securing a domestic double with a 4–0 Scottish Cup final victory over Aberdeen. Rangers' campaign in the Champions League saw them defeat UEFA Cup winners Parma en route.
Advocaat's third season saw Rangers fail to compete domestically against Celtic under new manager Martin O'Neill. Despite investment in the team, including Tore Andre Flo for a club-record £12 million, European success beyond the Champions League group stages again proved elusive. After a slow start to the following season, Advocaat resigned from his post in December 2001 and was replaced by Alex McLeish.
In his first full campaign, the 2002–03 season saw McLeish become the sixth Rangers manager to deliver a domestic treble. The championship was won on goal difference during a dramatic final day 6–1 triumph over Dunfermline Athletic at Ibrox, securing Rangers' 50th league title, the first club in the world to achieve the feat. Major expenditure sanctioned by chairman David Murray had burdened Rangers with considerable debts in the region of £52m. The club's worsening financial state saw many of the team's top players leave in the summer of 2003, the following season failing to deliver any trophies, only the second such occasion since 1985–86.
The 2004–05 season restored success to Rangers, who were boosted by signings such as Jean-Alain Boumsong, Dado Pršo and Nacho Novo, along with the return of former captain Barry Ferguson after a spell in England with Blackburn Rovers. The club's league championship triumph culminated in a dramatic final-day finish. The destination of the trophy changed unexpectedly, with Celtic conceding late goals to Motherwell at Fir Park whilst Rangers led against Hibernian, requiring the helicopter carrying the SPL trophy to change direction and deliver the prize to the Easter Road ground in Leith.
Despite beginning as favourites to retain the championship, Rangers suffered an unprecedented run of poor results between September and November, a club-record run of ten games without a win. Included within this period, a 1–1 draw with Inter Milan took Rangers into the last 16 of the Champions League, the first Scottish team to achieve the feat since 1993, the club eventually exiting on the away goals rule to Villarreal. On 9 February 2006, it was announced by David Murray that McLeish would be standing down as manager at the end of that season.
Frenchman Paul Le Guen replaced Alex McLeish as manager after season 2005–06. The season started with an early exit from the League Cup whilst Celtic built a commanding lead at the top of the table. In the UEFA Cup, Rangers became the first Scottish side to qualify for the last 32 of the competition, since the introduction of the group phase, after finishing their group unbeaten. However, amid claims of disharmony between the manager and captain Barry Ferguson, it was announced on 4 January 2007 that Le Guen had left Rangers by mutual consent.
Rangers F.C.