Steve C. wrote and asked a couple of questions about the rules on stance, chainguns, and tanks.

My response in part:

Steve:

Here are the reasons behind the stance rule: First, stance affects movement speed in real life. Second, there is a trade-off involved. A prone soldier is slow but he gets a big defense bonus. A kneeling soldier is less slow and gets a smaller defense bonus. Standing soldiers are normal speed, and get no defense bonus. Running soldiers are faster still, get no defense bonus, but cost an additional point.

Chaingun = any gun that has ammo hanging down like a chain. But also, any heavy gun is treated as a chaingun. Sometimes a soldier has one of these weapons on a tri-pod. Sometimes he's lugging one around like Rambo did at the end of First Blood. Any gun mounted on a vehicle - including a tank's secondary gun - is treated as a chaingun.

Tanks: The tank's main gun is treated exactly like a bazooka – three rounds only. The tank's chain gun operates under the normal chain gun rules. The main gun and the chain gun do not cost extra points on a Tank. On its turn, a tank may move up to its full speed and fire both the main gun and the chain gun."

To see how the main gun operates, see the rules on bazookas and also the rules, generally, on explosive weapons (page 3). Read also the vehicle rules to see the effect of explosive weapons on the vehicle. The tank's secondary gun is a chain gun (page 2).

Treating the tank's primary cannon as a bazooka is another example of realism being sacrificed for simplicity. I think it keeps the game simple and fun for beginning gamers... but your mileage may vary.