The Troops of C&C Generals

Aurora Bomber:
If you're playing against a minor league baseball player who has to spend $30 million in 30 days, expect him to buy a lot of these babies. The Aurora Bomber might be the most expensive unit on the US side but it's more than just a pork-barreled boondoggle. It's effectiveness really shines through when you need to take out enemy buildings in a hurry. But this specialization in building busting comes at a price: the Aurora Bomber is very vulnerable to anti-air defenses and enemy fighters. Make sure to take control of the skies and send a few commandos in to take out the turrets.

The Aurora Bomber also comes with a very effective supersonic attack that makes it effectively immune to enemy fire for a short period of time. This is a useful tactic if you can't provide any short-term protection and need to take out emplacements quickly. Make sure you get the bombers out of harm's way soon afterwards since, once it wears off the supersonic attack halves the bombers' shield strength.

Chinook:
These high-tech helicopters are normally employed to ferry supplies around the map. Built and based at your supply centers, they roam the map seeking out supply depots. Once located, the supplies from these depots will be dropped off at your own base where they're converted in to the currency used to buy units and structures.

But the Chinooks do have one particularly effective combat role. Once you've got the requisite upgrades, you can use the Chinook to perform combat drops with your Rangers. And nothing's worse than seeing an enemy supply chopper fly over your base only to find that what it's supplying is a whole heaping can of ass-whooping.

Colonel Burton:
The only individual unit in the US arsenal, Colonel Burton is an elite commando who's capable of taking the fight to the enemy almost single-handedly. He's camouflaged when he's not moving or shooting, so he can safely lie in wait and keep tabs on the enemy. His ability to place bombs capable of tremendous devastation makes him an effective base raider as well. Since you can only build one of these guys (Colonel Burton doesn't accept imitations), make sure to take good care of him.

The only way to circumvent the Colonel's unique abilities is to build lots of scouts and position them at every possible approach to your base. They won't be enough to stop him on their own, but at least you'll know he's coming. And as G.I. Joe says, knowing is half the battle. In case you're interested, the other half is having lots of daisy cutter mines and an army of robo-wolves. The latter seem to be missing from our builds.