And so?
Your argument is no longer "People aren't offering to sell the US roughly 1/2 of its modern territory" but rather "Special circumstances are needed."
I think this would give Japan even more reason to attack the US then OTL also.
My first question is were they selling that land?
Assuming they were, the Russian Revolution jumps to mind. I'm not sure how happy the US would be with Reds right next door, and while I'm not sure how advanced Alaska was in 1918(and, in ATL, American far-east), I think the US would send enough troops to ensure Russia remains White.
I think this would give Japan even more reason to attack the US then OTL also.
The U.S would never be allies with the Japanese militarists!
Hey Cabbit, I'm currently working on a TL where the US annexes the Dominican Republic. Your tl has an interesting premise, and, since our ideas don't directly contradict each other, want to merge them? (if this was an extremely n00bish question, tell me and I'll go crawl in a hole and die)