Exactly my point. If they negated the effect of New Guinea, they would not have any need to protect their flank and could have put everything against Guadalcanal. Whether they could or not is not in question because they already had troops in every part of New Guinea except for Port Moresby. Although the plans were in place for such an occurrence you don't just let it happen. Why not Townsville or Brisbane or Sydney. Not even close. It is over 1,000 kms or over 600miles or a 1200 mile round trip. And remember at this crucial time on Guadalcanal they could not support bombers from Guadalcanal. September, October 1942. Well if this was common knowledge in 1942, why did they even bother invading Guadalcanal. They should have just waited until the end of 1943 or maybe 1944, bypass everything and go straight into Tokyo bay. I am not marginalizing the the taking of Betio and the resultant loss of life. I am just making the point that New Guinea would not have left only a few thousand Japanese behind their lines. With the operation in The Marshalls, with Kwajalein Island in particular, they bombed them incessantly for two months prior to the invasion by sea and Air with 15,000 tons of bombs. Rabaul could be isolated because New Guinea was in Allied hands. There were 100,000+ Japanese on Rabaul which were available and could have been sent to Guadalcanal. It is history that it did not and nearly 90,000 Japanese surrendered there in 1945. Of course. The war in the Pacific was won with Naval supremacy. I can imagine anything however all what you are saying and predicting is with the benefit of hindsight and not as the situation was in 1942. Even Yamamoto knew that after Pearl Harbor, Japan could not match the industrial might of the United States and consistently pushed for those battles that would destroy the US naval strength and make the US sue for peace. Coral Sea, Midway and other major naval battles, except for a lot of luck and better intelligence, could have altered the course of the war. (Not the result) Just supporting how precarious the situation was, a group of Coastwatchers provided the intelligence and early warning system that saved Guadalcanal. And I qoute: United States Admiral of the Fleet, William F. Halsey paid high tribute to Australian Coastwatchers. He said: "The Coastwatchers saved Guadalcanal, and Guadalcanal saved the South Pacific."