Hampton Roads
Beginning in 1917, as the United States became involved in World War I under President Woodrow Wilson, formerly rural Sewell's Point became the site of what grew to become the largest Naval Base in the world which was established by the United States Navy and is now known as the Naval Station Norfolk.
Holmen Naval Base
The naval base used to occupy the entire area of Holmen, which was in fact created by a series of landfills to house it, but is now confined to its northernmost island of Nyholm.