During its lifetime, Ballyhalbert was home to RAF, Army, Navy and United States Army Air Forces (USAAF) personnel.
•
In May 1917 four vessels, the Saint Mungo, Derrymore, Amber and the Morion, were captured and sunk in Ballyhalbert Bay, by U-boat UC 65 under the command of Otto Steinbrinck, one of the most famous U-boat commanders of World War I.