Gun Truck/Pre 1.3

Overview
At first glance the Gun Truck looks like a very powerful vehicle, but once you review the available information it starts to lose its allure. The Gun Truck utilizes a high-damage (140), one-shot weapon which is powerful enough to eliminate many infantry units and possibly lesser vehicles in one single hit. Its low accuracy however (75%), at least compared to other units, dampens the initial enthusiasm.

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 Ramsy'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 20 or so, you will obtain two Gun Trucks for free if you complete the siege of Marin quest.