It's the...

[Andrew Gorman]

There's a Twilight Zone episode "The Last Flight" Where a WWI RFC pilot lands his Nieuport at a USAF base ca. 1959, Chock full of B-47s.  "The Americans- I had no idea they were so advanced"  and then takes off into oblivion and redemption.  Some echoes of the William Shatner TV movie "Sole Survivor".  It's a good 'un I still remember after seeing it 50 years ago...
https://en.wikipedia.org/wiki/The_Last_Flight_(The_Twilight_Zone)

[NARSES2]

the bigger impact is foreknowledge, which lasts a short while until they change events enough.

True, we always seem to forget that little wrinkle...

Very much so