Hi, Snoppy, and welcome to the board.
Strangely, (and no offence), I remember that strip and cannot recall it being funny at all. I did laugh at the one where he blindfolds himself to show he trusts his men, and Beau Peep is seen on one knee examining a mine and saying: "I don't know. It must be a dud." My dad is not too keen on the colonel either.
I guess different people find different things funny, which I guess says a lot about the range of humour Roger provides. I love some of the nomad's comments: "That's what I would have said if they hadn't opened fire."; "I wonder if I could smack him in the mouth before his men got me."; "Mummy!"