Rather, the aim is to enable experimentation with different force combinations and strategies to accomplish your goals at the least cost. By accurately modelling the weapons involved, real-life tactics should naturally evolve. Most of the units themselves seem to be modelled realististically. A wide variety of vehicles appear in Force 21. Each unit has it's own statistics, weaponry, armor, and movement that varies with the terrain.
Weapons vary in their accuracy and effectiveness against different targets.
The differences are not trivial, even among MBT's. Conversely when I had the M1's in my command, I was afraid of a few things. Regardless of what units are involved, success depends on good strategy. Unlike many other Real-Time Strategies, all units have important roles to fill, and one unit will not win a war. Even a suprise flank attack from some TOW scout units can wipe out a tank column.