HvA fortress assault

The aliens have deployed a fortress that they're using to recharge their forward assault forces. We must take out this base at all costs. Coincidentally, the fortress's recharging capabilities have allowed for the aliens in the area to effectively wipe out almost all of our nearby forces. Thus, you have very few troops to work with. YOUR OBJECTIVE: Fight through the alien defenses and destroy their fortress by whatever means necessary. Mankind is depending on you, soldier. Rules: no loading in parts/techs. Usage of trading stations/payload terminals is prohibited. You can use whatever you find to make your vehicle/person as powerful as you want.