As your precious troopers advance in rank they will be authorized to pilot mechanized suits and heavier weapons - they will likely retain the huddled mass formation. The safest way to keep your men alive is to group them into a huddled mass (circle formation) to concentrate their firepower. Your men will start the game in the basic MI armor, a grey helmet and a grey tunic.
You are in command of a squad of Mobile Infantry (MI) and tasked with various missions that usually involve running around a map and shooting rockets at bugholes. This was an excellent game (you can DL it for free nowadays).
