The United States has never recognized the construction and continuous occupation of a lighthouse since 1832 by the United Kingdom, and now Canada, to determine the island's ownership, citing several cases worldwide (e.g., a case concerning the Red Sea).
In 1918, with Canadian agreement, a small detachment of Marines was placed on the island following the U.S. entry into the First World War, as a means to assist in protecting the territory and its key lighthouse guarding the entrance to the Bay of Fundy from German U-boat attack [REF].