Naval Advance Base Espiritu Santo
Naval Advance Base Espiritu Santo or Naval Base Espiritu Santo, most often just called Espiritu Santo, was a major advance Naval base that the U.S. Navy Seabees built during World War II to support the Allied effort in the Pacific. The base was located on the island of Espiritu Santo in the New Hebrides, now Vanuatu, in the South Pacific.
Source: Wikipedia — Naval Advance Base Espiritu Santo (CC BY-SA 4.0)