Naval Base Adelaide was a United States Navy base at Adelaide and Port Adelaide, South Australia, Australia during World War II. Northern Australian ports were within reach of Japanese long-range bombers. The bombing of Darwin on February 19, 1942, demonstrated that a more southern port was needed, with Adelaide, in southern Australia, being distant from the possibility of any current or future attacks. The existing port facilities at Adelaide were large enough to support the staging of future actions. Local civilians were hired to help in the unloading and loading of US Navy, US Army and Merchant Navy ships.