528 Deserters
The truckloads of refugees had platooned together for safety on their way here, so there were dozens of them in the convoy, all set to arrive at nearly the same time.
Wolfe had [Detect Hidden] turned all the way up and was ignoring Mary and her cat, who were discussing the eerie nature of the effect that it had on his eyes. It looked like almost half of the occupants of the vehicles were witches, which meant that there had to have been as many deserters as fleeing villagers.
There weren't that many witches with the army when he left, so either the villages had suffered very heavy casualties or there were a lot more of them coming later, and the deserters had been sent on ahead so that they wouldn't reconsider and rejoin their force if the convoy was caught on the way westward.