The United States Army Corps of Engineers was a division of the U.S. Army which focused on military engineering, design, and projects requiring construction expertise.
The Corps of Engineers was involved in the construction of T-51 power armor along with West Tek, with the T-51b model in assembly line production by September 2075. By the following year, the power armor completed testing with the Corps of Engineers in June at Fort Strong and quickly entered frontline usage with American soldiers, giving them the tools they needed to confront the Chinese overseas.
In 2077, the 132nd Engineering Corps of the Corps of Engineers was assigned to Sentinel Site Prescott, located southwest of Boston. The division was still present at the site when the Great War struck, with one of its members, Captain Mitch Dunleavy, attempting to contact military command for orders but not receiving any reply.