United States Army Air Forces in the South Pacific Area southern areas of the widely separated Seventh Air Force and independent units scattered in the South Pacific Area during the Solomon Islands campaign. As the war progressed, Thirteenth Air Force units moved into the South West Pacific theatre and coordinated their activities with Fifth as part of the Far East Air Forces, a new Command. COOK ISLANDS ELLICE ISLANDS FIJI ISLANDS NEW CALEDONIA NEW HEBRIDES ISLANDS NEW ZEALAND NORFOLK ISLAND SOCIETY ISLANDS SOLOMON ISLANDS Bougainville Island Buka Island Guadalcanal Island New Georgia Islands Russell Islands TONGA ISLANDS United States Army Air Forces in the South Pacific Area During World War
Geology of the Pacific Ocean . The Pacific Ocean developed from the Panthalassa, a vast global ocean, following the breakup of the supercontinent Pangaea in the Mesozoic Era, gradually forming Gondwana and Laurasia, which in turn divided. There is no firm date for when the changeover occurred, as the replacement of the sea bed is a continuous process, though reconstruction maps often change the name from Panthalassic to Pacific around the time the Atlantic Ocean began to open. The Panthalassic Ocean first opened around 750 million years ago at the breakup of Rodinia, but the oldest Pacific Ocean floor is only around 180 Ma old.