Following the failure of their Coral Sea invasion plan the Japanese shifted direction towards Hawaii once again. But, what if instead they just made a second attempt at Australia from a different direction? This version occurs in late May early June and is very typical of Japanese operations with multiple approaches and diversions going on. First, the Japanese send the carriers Hiyo and Junyo along with a regimental sized landing force, including a seaplane tender, to the Aleutians where they invade and take Umnak Island and launch carrier strikes on Dutch Harbor and Unalaska. Next, the main force consisting of the Kido Butai with their four operational large carriers along with an invasion fleet enters the Timor Sea and proceeds to strike and then land a reinforced division near Darwin that is tasked with taking that city. Now, in February the Japanese had hit Darwin with carrier strikes causing a major panic there so, a return and landing would have likely caused bigger issues for the Australians in general. The follow up to this landing is a second division that will follow within a couple of weeks. In addition, the IJA strengthens its air forces on Timor to support this operation once the carriers withdraw. The Japanese hope to capture an airfield or two near Darwin to allow basing forward there as well. A secondary operation is also launched to occur a few days after the main landings near Darwin. This one puts a weak division (about 12,000 men) at Buna New Guinea. A second operation mounted simulatneously puts about 1,200 men ashore at Milne Bay. Follow up waves are intended to approxmately double this force within weeks. From the Allied perspective, the Umnak landings would have been unopposed as the island was not occupied in June 1942. There is a US force on Unalaska Island at Dutch Harbor and environs. There are also some USAAF aircraft in limited numbers there. The fighter defense is P-39s at this point. The Buna landing would have also been unopposed as it was when it occured in August historically. The Milne Bay landing would be facing a company of US engineers and a company of Australian infantry building an airfield at Gili Gili. The Darwin landing would have faced minor opposition only initially. The US 32nd ID is in Australia but near Brisbane at the time. There are also one or two Australian divisions on the Western coast of the country. Airpower for the Allies is also fairly weak consisting of about 100 or so operational aircraft between the USAAF and RAAF with only about 30 or so P-40 and a few P-39 flying at the time. This might be reinforced to some extent from the US in a fairly short time but the additional aircraft would be either P-40 or P-39 fighters along with whatever bombers could be scrapped up. Allied naval forces in the region consist of 5 cruisers and about a dozen DD between the two navies. The USN could send just two carriers (the Yorktown wouldn't be repaired in time to sail to Australia... she barely made it to the Midway operation). Now, I don't envision the Japanese trying to take all of Australia. Instead, I see this operation as an attempt to force Australia to sue for peace. A side effect would have been an almost certain withdrawal of all or most of Australia's forces in the Middle East. This would have put the hurt on the British as Australian units make up the bulk of their best infantry formations there. A successful landing on mainland Australia along with the likely fall of New Guinea would have had serious morale implications in Australia. MacAuthur would also have been put in a bind politically as well as militarily. The Australians might see him as incapable of dealing with this new offensive and the US as uncommitted. Even if Australia didn't knuckle under (which is very likely as I don't see them giving up easily) it certainly puts alot more pressure on the US and conserves Japanese naval assets far better than the Midway operation did.