Gun Truck

Overview
The Gun Truck is a hauler that has a rocket cannon mounted on it. The Gun Truck's high powered cannon can eliminate most infantry and weak vehicles.

Once you review the available information it starts to lose its allure. The Gun Truck utilizes a high-damage, one-shot weapon which is powerful enough to eliminate many infantry units and possibly lesser vehicles in one single hit. Its low Offense of 24, at least compared to other units, dampens the initial enthusiasm. Also, the gun truck only has 85 HP and a hefty healing cost of 960 iron, 435 oil and 6300 gold, so keep it behind of a defensive troop.

As mentioned in the quest that tells you to create this vehicle ("Guns on a Truck"), the Gun Truck is supposedly a hauler (from your Resource Depot) with a cannon or bazooka attached and some kind of ammunition laid in the bed, as per Sergeant Ramsey's instructions.

It might be worthwhile to have Gun Truck units later on, but an early adoption is probably a bad idea for how much Iron and Oil would be needed to produce them.

Note that by the time you reach Level 22, you will obtain two Gun Trucks for free if you complete The Siege of Marinquest.