Eddie Howe took over Bournemouth in 2008, back when the club flirted with bankruptcy. It struggled to remain relevant even in League Two, overcoming a 17-point penalty for failing to follow insolvency rules.
The Cherries eventually came together under Howe, who helped them secure three promotions over the next six years, and ultimately a trip to the Premier League in May.
Saturday's 1-0 win at Chelsea, Howe says, crowned their journey from the depths of professional football to the very top.
"In my opinion, it's probably the biggest result in the club's history. I thought we looked a constant menace, especially the first half. And when the goal came, it was a great time for us," the 38-year-old manager told BBC Sport.
As if the club hadn't already overcome enough adversity, long-term knee injuries to defender Tyrone Mings and forwards Max-Alain Gradel and Callum Wilson hit the team early in this campaign.
Howe admitted that those setbacks hurt the morale of his side. But Bournemouth turned things around in the end of November, ending a four-match losing streak with draws at Swansea City and against Everton.
"We believed we were on the right path. If you look at our recent games, we've done really well," Howe said. "Today was a different kind of performance. We had to show a different side to our game. So pleased for the players, they get their reward for all their hard work this season."
The first half was even, but the second saw Bournemouth forced to defend deep in its territory. Goalkeeper Artur Boruc made seven saves in all, allowing his teammates the opportunity to take the lead
That came in the 82nd minute. Substitute Glenn Murray headed in the loose ball after a corner kick, and although he appeared offside, the goal stood.
"To win away at the home of the champions is a huge result for the club, one that hopefully will be talked about for a long time to come," Howe said. "But hopefully there's more moments like that ahead of us."
Bournemouth made a little history, as well, as it was the first time the champions of the second tier have won at the ground of Premier League champions.
"It's a great feeling in the dressing room, it was really emotional afterwards," Howe added. "It's great to see for their own self-belief. If we can win here, we can do it anywhere."
