Revealing mistake: Season 3, Episode 68, "The Duel": The prop wash from the helicopter filming the overhead scenes are evident as everything (dust, twigs, leaves, etc.) is being blown around.
More mistakes in Combat!
Braddock: Don't just stand there sucking on a prune pit, get these men some water.
Mountain Man - S3-E1
Trivia: Pierre Jalbert (Caje) was actually an accomplished professional skier before his role in Combat. All of the sking scenes with Caje was actually Pierre Jalbert doing the skiing.