Yep who played the BN CDR oh yeah the you will shoot your eye out kid. He did a good job in the pic. Another film I can't find was a silent Pic of an American Platoon crossing no mans land with an doomsday tune being played. It only showed the men and when they were getting picked off. Wish I could remember the tile of it.
The Big Parade, thanks Google. Also another WW1 movie I always watched, Well SGT York of course was The Blue Max.