Half-Life 2 Central has managed to get a intervew with the peep's behind the Gettysburg mod

Here's a little bit of it:

As we know from valve's e3 demonstration, half-life2 will feature extensive vehicle support. Will you be taking advantage of this implementation, and what type of vehicles can we expect to see in Gettysburg?

We will be taking full advantage of this feature. We will be having horses, Iron Clads (boats) and probably some Horse drawn wagons ammo carts and cannons which can be un-limbered (set up).