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.
Royal Naval Dockyard, Bermuda
HMD Bermuda (Her/His Majesty's Dockyard, Bermuda) was the principal base of the Royal Navy in the Western Atlantic between American independence and the Cold War. Bermuda had occupied a useful position astride the homeward leg taken by many European vessels from the New World since before its settlement by England in 1609. French privateers may have used the islands as a staging place for operations against Spanish galleons in the 16th century. Bermudian privateers certainly played a role in many Imperial wars following settlement. Despite this, it was not until the loss of bases on most of the North American Atlantic seaboard (following US independence) threatened Britain's supremacy in the Western Atlantic that the island assumed great importance as a naval base (the attendant Bermuda Garrison of the British Army existed primarily to protect the naval base). In 1818 the Royal Naval Dockyard, Bermuda officially replaced the Royal Naval Dockyard, Halifax as the British headquarters for the North America and West Indies Station.