Inside the Dinosaur national Monument in Utah, there is a small redoubt. Ambika used the redoubt to wage her raids against the baron's ore convoys. The redoubt was originally named Oscar but Ambika changed it to Minerva. The color of the gateway walls were that of fried egg whites mixed with swirls of blue.
There is a second redoubt, identical in shape and size to the Oscar Redoubt located on the island about twenty miles north of the ruins of LA. The walls of this particular redoubt are chartreuse in color. From here, Ambika stages her raids against the Barons. The gateway in both are large enough to transport a Sandcat or APC.