Axe Throwers are a brand-new unit - they didn't appear in the previous campaigns. They are a very important unit - Axe Throwers can attack from a very long distance and eliminate lightly-armored units. This unit has a lot of health points and, most importantly, its attack reach is 5 tiles. One of the best ranged units - they are cheap and efficient. Axe Throwers have 3 movement points which makes them very mobile. You can use them in a "hit and run" tactic. Upgrade Axe Throwers to increase their damage and health points.
These Riflemen differ slightly from the ones you have faced in other campaigns. However, they are still a great ranged unit. Riflemen specialize in eliminating heavily-armored enemies, including those hiding in forests or fortifications. They have 100% armor penetration. Their attack's reach is 5 tiles. A very dangerous unit. Take care of them and make sure they don't lose any soldiers. A full squad can be very dangerous to your enemies. Their upgrades focus mainly on increasing damage.