#4 Winning the Double in his 2nd season
In only his second season in English football, Arsène Wenger laid down an impacting precedent for his Arsenal career. The Frenchman became the first foreign manager ever to win the double in England, as he led Arsenal to the Premier League and FA Cup in the 1997/98 season.
The Premier League victory was extra special as Arsenal won 15 of their 18 PL games after Christmas, overturning a 13-point deficit over Sir Alex Ferguson's Manchester United.
Winning the double was literally a rarity in that era and a foreign manager coming to do it in his 2nd season was deemed remarkable. Since then, Arsenal's greatest manager ever has gone onto win 10 major honours with the club, making them one of the most successful clubs in England.