You start with enough forces to defend your base for a while but should move quickly to get started on the offensive. Put 10 SCVs on minerals and 3 on gas this time, then build a spare SCV or two to do your constructing. Build a barracks first then focus on getting some units into bunkers but build the bunkers on the top level, at the western and eastern passages.. A key problem here is that the enemy is going to use siege tanks to attack your base. And they will use siege mode but you can eliminate this problem by having siege tanks of your own near your bunkers. They can't strike the siege tanks without moving in range of them. The delay when they attempt to deploy siege mode will be their undoing.. An additional bonus to having the siege tanks near your bunkers is that when a ghost attempts to come at your base (they only come from the east) with a nuke you can use your comsat station's scanner ability (you hotkey that right?) to detect him and the tanks will destroy him almost instantly. Just listen for the warning and see where the red dot is pointing. Somewhere nearby there is a ghost.

When you've got your base running and well defended build two armories to research both ship and vehicle upgrades. The only base I recommend you assault of the two on this map is the red one to the northwest. The white base is very powerful and you can waste a lot of resources trying to destroy it. Instead, make your base very defensive and prepare to assault the red base. You don't need a lot to do it. Six siege tanks, six goliaths and 12 or so marines can do it. Just cause as much damage as you can and if you lose you can come back. The six siege tanks can make sure you put a nice dent in their military production. Focus on their factory first so they can't build more siege tanks, of which there are a few around their base While your assault is moving forward you can prepare for the next phase - assaulting the ion cannon. Begin preparing six battlecruisers and two dropships. Thankfully the battlecruisers can serve as extra base defense while you're dealing with the reds. When you've eventually crushed the red base we're on to the more complex problem - the ion cannon.

Take your battlecruisers and two loaded dropships to the northwest just across the gap between the main area and the ion cannon platform. This will be your staging area. The dropships are going to act as ferries between the platform and the main land. Pump out marines, goliaths and tanks first of all. You can pick some of them up with dropships but make some of them walk to the staging area. Take a solitary battlecruiser and fire the Yamato gun on the southwestern-most missile turret. When it's destroyed you have a safe place to land your troops. The enemy may send transports across the gap with ghosts inside attempting to use lockdown then cloak. Use your scanner station to reveal them and eliminate. That's the idea. One less ghost over on the platform. Send the dropship troops over but don't take the battlecruisers. They'll act as guardians. Keep pumping out units at your base then take your first assault force into the fray.

Hopefully you can manage to kill off the initial wave of ghosts and hopefully the battlecruiser. If you can, even if you fail, the second assault will be much easier. Keep pounding at their defenses and when you sense it's safe send you battlecruisers in to finish off the missile turrets. The whites may send some reinforcements - battlecruisers. Focus your fire with your group and distract them while your remaining ground forces make a run for the ion cannon. When it's destroyed you've finished the mission and the Terran campaign.