"It's too late to give up now." The Brigadier mumbled to himself, "I have already lost the element of surprise. And now that they know I'm alive, these basta*ds won't stop hunting me down till they made it sure they had done their job well. My hastiness will lead to my demise."
Unlike what Talos had thought, the Brigadier didn't have a plan to miraculously defeat them. He had been completely dependent on his army and had hoped to overwhelm them with their sheer numbers, just like he had done with all the other bases. But it looked like this time he made a wrong decision.