There's quite a lot going on here - it is certainly comedic, but there is also plenty of action and even some romance in this American Civil War story. Keaton ("Johnnie") has been deemed more important as a railroad engineer so was rejected as a soldier - but this cause...

This is Keaton’s masterpiece, a flawed one, yes. It’s not funny enough and the story could be developed more. But it is significant, flaws and all. The closest a film will ever get to flawed perfection.

Just amazing.

Really, really impressive scenes with the railway engines and a physically incredible Keaton.