As a strategic blow intended to prevent American interference in the Dutch East Indies for six months, the Pearl Harbor attack was a success, but unbeknownst to Yamamoto, it was a pointless one. In 1935, in keeping with the evolution of War Plan Orange, the US Navy had abandoned any intention of attempting to charge across the Pacific towards the Philippines at the outset of a war with Japan. In 1937, the US Navy had further determined even fully manning the fleet to wartime levels could not be accomplished in less than six months, and myriad other logistic assets needed to execute a trans-Pacific movement simply did not exist and would require two years to construct after the onset of war. In 1940, US Chief of Naval Operations, Admiral Harold Stark had penned a Plan Dog memorandum, which emphasized a defensive war in the Pacific while the US concentrated on defeating Nazi Germany first, and consigned Admiral Husband Kimmel's Pacific Fleet to merely keeping the Imperial Japanese Navy (IJN) out of the eastern Pacific and away from the shipping lanes to Australia. Moreover, it is questionable whether the US would have gone to war at all had Japan attacked only British and Dutch possessions in the Far East.