You should know that Dismas and the two others were originally accompanied by Barton's artillery unit. Lance arranged it this way because many of the artillerymen lacked combat experience. They're fine with shooting and firing cannons from a distance, but if ambushed by heretics and drawn into close combat, it would be troubling.
But perhaps because Balistan opened the road ahead, attracting attention or clearing troubles along the way, they proceeded unexpectedly smoothly without obstruction.
They even caught up with the second unit. However, upon knowing Balistan's advancement, Barton immediately ordered Dismas and the others to move ahead for support first and then led the main force over.
If not for this decision earlier, the situation would have been more troublesome.
