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Houllier arrived in 1998, joining the incumbent manager, Roy Evans, for their ill-fated spell as co-managers.
Evans left, surprising no one, and Houllier became the lone man in charge.
He was left with a tall task ahead of him. Liverpool was a club that was in dire need of rebuilding.
A couple of years into his reign, Houllier looked to be putting the Reds on a path to major success.
During the 2000-01 season, Liverpool won the League Cup, FA Cup and UEFA Cup. It may not have been the most impressive treble, but it was a treble nonetheless.
The club then started the following season with a UEFA Super Cup title and the Community Shield.
However, it was also that same season that Houllier had to have emergency heart surgery. After that, he just didn't look to be the same manager.
The club was never able to regain the form that it showed in that treble-winning season.
Instead of being remembered for bringing in Dietmar Hamann and Sami Hyypia, the Frenchman is more remembered for purchasing Salif Diao, Bruno Cheyrou and El Hadji Diouf. It was Houllier who also decided not to sign Nicolas Anelka to a permanent deal.
History should still look kindly upon Houllier and his time at Liverpool.