1) We leak we have the codes broken. We had it printed in a paper after Midway. One guy seized a maritime Jap code book prewar, so they changed their codes. It takes a minor flaw (POD) somewhere to let the Japanese learn of the broken codes. Then have it change some battle to a worse result.
2) Let the breaks go the way Japanese way at Midway. Slows down war effort for a while.
Combine the two somehow, so the IJN is victorious at Midway, with 1-3 of the US carriers sunk?
It would work pretty well. Japan learns of codes broken in April 42, sends fake plans to USA in codes, then wins the battle at Midway. I guess if they knew the carriers would show up, they could cancel the invasion force entirely for Midway and just send carriers. Give them a clean win of all 3 USA carriers, with they keep all 4. If we are going to load the dice, lets load them. Then USA is months behind OTL until the new ships show up in 1943, and then the USA starts to catch up. We need to keep MacArthur in power, so we still do two prong USA attack. Maybe with busted navy cred due to Midway loss, Mac can get the Central Pacific part of warplan cancelled. Who knows, maybe Mac can attack into Indonesia since USN is "too weak" to take on IJN.
There's an easier way, maybe, with bigger effects.spdoyle said:Combine the two somehow, so the IJN is victorious at Midway, with 1-3 of the US carriers sunk?BlondieBC said:Japan learns of codes broken in April 42, sends fake plans to USA in codes, then wins the battle at Midway.