Casper's eyes were going dried because of the time he needed to pass looking to those screens several times and analyze the situation while he worked in the countermeasures to prevent the Ridires to vanish his troops.
As he saw through the cameras, Alfar was doing an awesome job, making the prisoners engaged in battle in the vanguard retreat and tell the others to do the same thing. Olaf was helping as well. The majority of prisoners were settled in the rearguard, wiping the Ridires and dominating the different rooms set in the South of Halden's complex.
Just in that part, they had a lot of things to conquer, and they needed everything entirely clean to make sure that they would have a good basis to start with the rest. However, as the order for the retreat came, even under the drug's effect and with the will to make it happen rapidly, the prisoners started to retreat.
