Vehicle Production Facility
These fully automated factories are a result of Otani-Lincoln Laboratories research into autonomous All Terrain Structures, as part of a research project commissioned by GDI's Mil-Spec Omnibus Agency. In 2040, 30 years after their initial contract, GDI deployed the first OLL designed War Factory of the modern era during the battle of San Vicente in Argentina.
Combining the ability to manufacture light and heavy armor in a high throughput robotic manufacturing with the build anywhere and ATS design principles, the OLL War Factory was credited with turning the tide of the battle and obtaining victory for the GDI ground forces over NOD terrorist cells worldwide. While the actual output of the War Factory is classified the numbers are reported in the press to be in the range of 1 to 2 minutes for light armored vehicles and tanks.
These next generation war factories are equipped with repair drones, automated flying robots capable of repairing any damaged vehicles in the vicinity of the factory, as long as they are still functioning.
For a list of units that could be produced by the factory, examine the list of units constructed in the war factory
The War Factory can be used to aid in vehicular base defense, as it will repair vehicles nearby even as they take damage. As a result, it's a useful tactic to place it near the "forward" edge of your base. They do not, however, project a ground control radius, focusing resources instead upon unit production, so this may make further localized base expansion more difficult in that direction. War Factories are responsible for MCV production, making them a big target for "disabling" a base once construction buildings have been eliminated. As such, they should alternatively be defended well, to allow recovery in the case of accidental MCV loss.
While the original design called for a tall, circular building, for unknown reasons, the building in the final game is a simple assembly hall, while the large, cylindrical war factory was recycled in Tibeirum Wars as Munich's defence nexus and in Kane's Wrath as a Tiberium processing plant strategic structure. However, it can be assumed that the backstory in the GDI style guide is still applicable, as most of the details match.