1998–99 Manchester United F.C. season - Wikipedia
2020–21 Manchester City F.C. season - Wikipedia
2013–14 Arsenal F.C. season - Wikipedia
1999 manchester united the treble and all that 1999: Manchester United, the Treble and All That
The Championship Manager 99-00 Challenge: December '99 - The Busby, championship manager
2022–23 Manchester City F.C. season - Wikipedia
Manchester United FC Squad, 1993-94, Football Wiki
Manchester United - Schedule 98/99
The Championship Manager 99-00 Challenge: December '99 - The Busby, championship manager
What is the definition of a 'treble'? Is winning two major trophies (Leagues, Champions League, etc.) equivalent to winning a 'treble'? Or should there be an asterisk next to such a victory