The Auto Plant is a military production facility which allows a nation to build vehicles and tanks. It's the upgraded version of the Stable and available from the Industrial Age on. When a nation enters the Industrial Age, all of it's Stables are upgraded to Auto Plants automatically and for free. The building's stats, including resource requirements, remain largely unchanged from this, except for the plunder value, which changes from Timber to Metal. Unit types built at the Auto Plant (from Industrial Age on): * Ranged Cavalry (armored infantry fighting vehicles) * Tanks