M109 Paladin

The basic artillery vehicle for the USA side. Able to do long-range bombardment on any ground targets with relative accuracy.

Description

Available at Rank 3 from the Tank Supplystation.
Can engage vehicles, buildings and infantry but only if they are within their range.
Effective against all ground targets.
Has an extreme range but a very low view sight.
Takes some time to reload after firing.
Reveals itself through shroud to all enemies when firing.

It can destroy most ground targets but not very effective, though.
Use in pairs to ensure that the target is hit.
They are very weak, so keep them protected from all types of attacks and especially air attacks.
Never use them in the frontline.
They are most effective at destroying structures.
Can clear buildings very efficiently (50% to kill two garrisoned soldiers)

Kills any infantry unit with a direct hit.

Destroys most MBTs with 2-3 direct hits, but takes more than that to destroy heavier MBTs like T-80BVs and M1A1s.

Ideal for structural bombardment.

Anti-Tank missile can take it out with one hit.
Anti-Tank Soldier can take it out in three shots.
Anti-Tank vehicles like the Humvee TOW and BRDM-2 AT-5 Spandrel can make short work of them.
They can't fire if you come within a short distance of them, so be sure to exploit that for your advantage.
Base defenses and garrisoned structures are a bad defense against an M109, as it can destroy the defences from afar.
Counter-artillery is a good way of destroying them, so build a few of your own artillery units if you are facing them.