This is what happens when all the guys are in love with the same girl.
Seeing his flame kissing his younger, more handsome brother, guy drunkenly signs up for the Hessian army, but then hides from them. In a rather hare-brained scheme, the brother volunteers to take his place, but can't stand to be away from home and makes a break for it, which  earns him a death sentence for desertion.
Not sure what Straßburg has to do with any of this, there are no mountains like the ones in this movie anywhere near that city.
The film has some technical issues, looks like it may have been spliced after several (about 3 or 4) tears.