Monitors fly high above the battlefield, reporting troop movements and the positions of enemy structures. While containing no armaments itself, the Monitor's extremely long vision range is considered by some to be the most effective weapon on the battlefield.
Keep Monitors out of harms way, as they have no offensive capability
Monitors have incredible sight range - you can often see the enemy before they see you
Monitors can be upgraded to become permanently invisible, allowing you to easily spy on enemies
Monitors gain stealth. Best used when facing heavy anti-aircraft fire.