Hints:

Overlap your troops' field of fire. Ensure that
they can support each other. When the point man
discovers the bad guys, it's important that the
rest of your force is in position to engage them.

Armies of Armageddon includes a chest full of weapons; use each wisely. For example, keep the grenade launchers in the rear of your formation. Doing so allows them to fire over your troop's heads and intervening obstacles a trait unique to the launchers.

The mechlike Comstrucks are awesome weapons, but not always the best machine to lead your troops. The enemy tends to focus its fire on the nearest threat. Although Comstrucks can absorb more damage than infantry, they will soon succumb to massed enemy fire, and you'll be left without the heavy support that they provide. It's best to lead with a screen of infantry and follow closely behind with the Comstrucks