I used it for small, medium, and even some large-scale engagements. I used the Last Battle maps, Squad Leader maps, Firefight maps, Car Wars maps, and just about anything I could find that was useable -- it's interesting to play on an Ogre/GEV map that has actual craters!
For counters, I sometimes used Last Battle counters or some from other games, but I often hand-drew counters or Xeroxed Squad Leader counters and modified them. Close, tedious, intensive work I'm no longer capable of.
I once had the rules set expanded to include just about every weapon and vehicle in the game or that I had done up stats for (at the time), but I haven't seen them in decades. Don't know what happened to them, or how I came up with the numbers.
