Sure, if someone commits treason and then surrenders nicely, put them on trial. But if they are shooting at you, what are your options? The technical crime of t

Sure, if someone commits treason and then surrenders nicely, put them on trial. But if they are shooting at you, what are your options? The technical crime of treason being committed by some percentage of people in an opposing army seems to be a real distant second to the shooting. How do you arrest an army?