[Sombre]

I worked out how I'd get the Empire war wagon working for the Warhammer: Empire nation.

Form 1 - Two horses, some missile prot from a shield much like the one Shovah describes. It has 3 missile weapons, one long range mutliple shot one, one medium range and one close range. Each of these only has 1 ammo. It has trample. This means if it isn't hit it will fire off the long range, move closer and fire off medium, then close range, then finally it will trample.

But if hit hard enough, it switches to..

Form 2: One horse. As form 1, but slower and lacks long and medium range weapons, forcing it to still try and close in to use the 1 shot from the short range. If this is damaged it goes to..

Form 3: No more trample. No more moving. Better cover effect, higher natural prot, ok hp and several melee attacks from the crew. It also regains the medium range missile weapon with 3 ammo, so it can fire at stuff as it flees, or still be useful if both horses got blasted half way to the enemy.

So basically it advances while firing, then tramples, if it takes too much damage it stays put and either fires away or kills stuff up close in melee.

After battle it always returns to form 1.

Pretty tough unit.

It's a bit different from the hussite style defensive war wagon you're after, but maybe it will give you some ideas.