(Third Person POV)
Desmond arrived at a watchtower on the north wall and started shooting arrow after arrow at any flying beast that approached the defensive perimeter, unfortunately, he could only play defense against the Ripper Crows as they were flying too high and difficult to control distinguish in the dark.
The military was tempted to stop Desmond for questioning, to see who the hell he was and how he circumvented the defensive perimeter by reaching the watchtower, but after watching him take down the second ripper raven, they decided that the questions could wait until they were sure that they would get out of this carnage alive.