Turns out I didn't change the settings, and the counterattack did occur. My stategy worked rather well, considering I'd set up the options so the best weapons I could get at that point were some crappier AK variants and such; not even M16A1s, etc, and also considering it was my first play through. I first took Drassen airport straight out of the start; I had my IMP merc, Ira, Grace, and Rudolph w/ his Mauser, which was the best weapon I had for the duration of the engagement. Unfortunetely the AI decided to counter attack w/ ~20 soldiers (dunno where they came from) and I couldn't defeat them; Rudolph was running out of ammo. Eventually I loaded a save and moved west and took Chitzena, leaving the airport in Deidrianna's hands. I had 4K coming in per day via the mine there, and I hired Flo from MERC, brought her over, and trained her leadership so she could maintain the militia there. Then I moved back to Drassen, and took the airport and the mine, circumventing the middle. I fully trained militia's in both sections to veterans, and got a bunch of mobiles that I locked into the adjacent surrounding zones. Finally I took the middle section w/ Dmitri, with the Mauser still my best gun. When the counterattack came, I let them take the mine sector. They left 17 dudes in the mine, and the rest of their forces in the surrounding tiles. I knew that they could reinforce from surrounding tiles, so me and the mobiles attacked the surrounding tiles in skirmished, which eventually removed all of the mine's reinforcements, as well as scoring me 2 AKMs and a Steyr Scout. Finally I took Drassen mine back and reinforced with Militia.
What should I attack next, by the way? This is still my first play through, and I don't know what's best to attack: Cambria, Grumm, or Alma. Each is within range for me to attack.
I would enjoy a Let's Play series of you figuring out that 'rape' is not a synonym for 'lose a video game'
Rape can be used as a figurative term; I used it right in context, particularily as I was referring to my in-game forces getting 'raped' as opposed to myself IRL.

Sorry, did I offend?