When Moyes succeeded Sir Alex Ferguson as United boss he was taking control of a club for whom Europe is of special significance.
Three times winners of the Champions League in its different guises, United were also England's first entrants into the competition and, two years later, suffered the tragedy that left a permanent scar on the club at Munich.
It is this past Moyes must live up to, and Sir Bobby Charlton reinforced on a visit to the Scot's office at the Aon Training Complex this summer.
"It was really important moment for me when Sir Bobby said he wanted to see me in my office," he said ahead of Tuesday night's opening group encounter with Bayer Leverkusen at Old Trafford.
"Everybody, when they see Bobby Charlton, is in awe of him.
"He was an incredibly humble man and he explained what it is like to be at Manchester United and what a Manchester United manager should be like.
"I will keep what he said to myself but there is a way to do things at this club. I understand that and I will try to uphold those traditions."
Amazingly, Moyes walks into a woeful European home record.
The Red Devils have lost four of their last six games at Old Trafford, most recently that controversial defeat to Real Madrid.