Nebraska

Nebraska is a part of the United States of America on the planet Earth.

IDW Comics continuity

The site of a Decepticon command bunker in Transformers: Infiltration can be found in back-woods Nebraska. Abandoned by the Decepticons, the base is infiltrated by Stoker. His photographs of the inside fo the bunker eventually fall into the hands of the Autobots. It is later discovered that the bunker was built atop a seam of Ore-13.

From Teletraan I: The Transformers Wiki, a Wikia wiki.