Hey Tanner! Just wanted to say my five-pence. Hope you don't mind. The US-USSR lend-lease was a very significant part of the Soviet efforts against the Nazis. In this scenario, with no Lend-Lease vis-a-vis US to USSR, the Russians might find it a tad bit more difficult to get the resources to fight against the Nazis. That combined with the fact that a significant part of the Red Army is up in arms against it, unlike OTL and many of the talented mid-level commanders might be dead in the subsequent purges, the USSR must be literally hanging on by its fingernails. Not to mention now almost all of the attention of the Nazis is concentrated on the Russian Front. And last but not the least there is the Turks.
Another point, the bio-weapon attack on the West Coast, shouldn't it have been a bit more destructive or at least disruptive to the American plans vis-a-vis Japan? I mean even with modern equipment it takes around a day to confirm whether the attack was biological/chemical/whatever. It could have taken a bit longer with the 40s tech, but then I could probably wrong. Also would the American's have really checked for biological weapons among the bomb's dropped unless they knew the Japanese were using them on the West Coast? Just asking... Maybe, a few more american's would have died along the West Coast before the American's would have realized what is going on in. And it would have definitely delayed the planned invasion of the Hawaiian Islands a bit, because clean-up and quarantine/containment
Anyways, I really like where this timeline is heading as of now and I am loving it! So looking forward to the next update! Cheers!