The Frenchman took charge of the club back on October 1 1996 and went on to build something of a dynasty.
At the time of his resignation, Wenger is the longest-serving manager in the Premier League and has taken charge of 823 games in the English top flight, more than any other boss.
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Whilst the last two years have threatened to diminish Wenger's achievements in north London, let us not forget the incredible moments that he brought to the 'Gunners'.
The 68-year-old claimed three Premier League titles and seven FA Cups during his 22 years in charge of the club, claiming the double in both 1998 and 2002.
No manager has won more FA Cup titles than the Frenchman, who also famously became the first manager since 1888/89 to lead a team through a season in the English top division unbeaten as his 'invincibles' side broke all manner of records in 2003/04.
On the European stage, the club never really recovered from their defeat in the 2006 Champions League final to Barcelona.
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However, it is impossible to understate Wenger's influence on English football.
When the Frenchman moved to Arsenal, he became only the third foreign manager to take control of a Premier League team, whilst his background in economics and relative lack of experience as a player put him at odds with what was traditionally expected from a boss.
Simply put, little was known about the bespectacled boss, even by the Arsenal players themselves. "When he first arrived, we didn't know too much about him and one or two of the boys were asking 'Who is this French guy?'" admits former 'Gunners' striker Ian Wright.
- Innovation -
Drinking cultures remained prevalent at Premier League football clubs in the 90s, but Wenger quickly set about dismantling the dressing room cliques and implementing a new era of sports science.
His innovative changes, which included everything from what the players ate to doing away with tradition fitness work and introducing more ball work in training quickly gained him the nickname "the professor".
"I recall Tony Adams and myself, in our first Wenger pre-season, going to see the boss just before the start of the campaign," Lee Dixon wrote back in 2003. "Our feeling was that we had not done enough running. We were concerned that the team wouldn't be fit enough. The manager calmly explained to us that it was all scientific and that the team would be fine. 'Have faith,' he said. Sure enough, 10 days later we flew out of the blocks all full of energy and raring to go. That man knows what he's talking about."
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The reluctance of the players to be torn away from their fatty foods became known as the Mars Bars revolt, something which Wenger now remembers fondly. "I changed a few habits of the players, which isn't easy in a team with an average age of 30 years - at the first match the players were chanting, 'We want our Mars bars!'" he recalled.
Whilst those factors may seem bread and butter these days, Wenger was met with stubborn resistance from the Arsenal squad at the time and the fact that they are now so commonplace is testament to how far ahead of his time the Frenchman was, with many players crediting Wenger for extending their careers.
Meanwhile, Wenger also had a huge impact on modern scouting, putting in place a network of trusted talent spotters and being one of the first people in English football to employ the use of statistical data when signing players.
- Period of success -
The club soon reaped the benefits, with Wenger guiding his side to the double in 1998, become the first foreign manager in Premier League history to do so. Further league titles followed in 2001/02 and 2003/04, with FA Cup wins in 2001/2002, 2002/03, 2004/05, 2013/14, 2014/15 and 2016/17.
However, the influx of foreign money into the Premier League was the beginning of the end for Arsenal's trophy-laden spell.
- Playing catch up -
If there can be one criticism for Wenger it is arguably that he cared too much about the club. His insistence on ensuring the club was on a stable financial footing and the need to finance the Emirates Stadium led to years and years of limited investment in players, during which Arsenal became known as a "selling club", with the likes of Robin Van Persie, Gael Clichy, Ashley Cole, Emmanuel Adebayor and Samir Nasri all jumping ship to direct rivals.
In recent years, the story of Arsenal has been one of hanging on to other club's coattails. Champions League qualification became the main concern, with competing for titles very much secondary.
That, combined with their own errors in the transfer market and the imperious spending power of their rivals saw Arsenal fall behind, with the club unable to claw back their status as a domestic and European power, though it should not tarnish everything that Wenger achieved at the club.
20 April 2018