War Monger

War Monger is a war strategy game with a TON of options. Although it wasn't the first game of it's kind for the Coco 3 (Oblique Triad's Overlord or Sportsware's Wargame Designer II) were out earlier), it was probably the most sophisticated. It allowed you to design your own maps and icons, as well as rules for moving troops. You could even have pieces that could haul other pieces (ex. planes carrying troops).