Miscellaneous, Non-Frivolous ASB Ideas

So, mass-death scenario, then? Or, maybe more like James G’s Eagle Guardian TL (except with a more heavily armed, but less technologically advanced Russia as part of the equation)?

Good point. If I didn’t know better, I’d assume that the Soviets would take a much more cautious approach than slam the nuke button within moments of their arrival, so to speak. But thus far, the consensus here, however anecdotal, seems to be otherwise.

‘2020 Western Canada To 1960’. As in, the region depicted in this map from Wikimedia:

Yeah, I'll bet. Similar to how sections of 2020 and 1960 America would clash too often to reunite easily, I assume that 2020 western Canada would want out (with more than a few downtimer Canadians being receptive to that themselves). In addition to the various events that have taken place over the sixty years since 1960, news of Quebec's Quiet Revolution will also emerge, which I'm guessing that more religious elements of the country would want to stamp out--especially once they see how secular uptimer Canada has become.

'General Mattis SI To General Patton'.

Yeah, a time like 1941 would probably be best. Considering that Mattis is a) a retired general himself and b) more knowledgeable than most about military history, I think he'd do decently for himself. Even if he needs time to get accustomed to a an America without the permissive society, civil rights or digital technology (though, since he's turning seventy this year, he's old enough to remember that sort of world anyway).

Due to his uptimer knowledge, I'm wondering if he could revolutionize tactics, strategy and maybe even military technology (i.e. accelerating the development and deployment of attack and troop-transport helicopters, even if they're not useable in time for World War Two)?

Are you referring to Pearl Harbor specifically, or other significant battles that take place over the next few years? Or both?

Because even with Mattis-Patton potentially requesting an audience with FDR to persuade him to stop the Axis, and the US performing better in initial engagements than it did IOTL, that hindsight will probably become less and less useful as the resulting butterflies take flight. Then the timeline that Mattis has been sent to will have changed appropriately, though maybe grander-scale events like the Cold War could be better handled thanks to his foreknowledge, i.e. taking up a harder line against Soviet Russia as it tries to incorporate Eastern Europe into the communist bloc.