The GDI Defense Facility
This structure doesn't have much use. All it does is it dictates how high you can level your defensive structures. If this structure is level 30, then you cannot level your defense beyond level 30. it acts the same way as the Command Center but for defense. Not a structure you should worry about losing; it makes a great hold-up to put on the same line as you Construction Yard so use it's endurance to your advantage, it ain't really good for anything else.
