Accidental travel is a pretty normal writing trope one which is used in alternate history every once in a while A Connecticut Yankee in King Arthur's Court, Guns of the south (not sure if this one was a accidental time travel) plenty others but this. This is something else "popadantsi” is found in Russian works. Mainly propaganda works for the government and the stories within are sure something. Just so you can understand I’d like you to look at this 100% real cover of a book that was really released.
According to a rough Translation this is what I got
MILITARY-HISTORICAL SCI-FI
Victor Dubcek
RED PADWAN
I have not confirmed if permission was granted to use Darth Vader on this cover but I’m leaning no because. Well look at it. Anyways thanks for reading my 2am rant about a weird sub section? I think that’s what you’d call it of alternate history
And there’s the summary from a old comment I found
"There are books which stories retold sound like feverish drivel. Dark Lord Darth Vader arrives on Earth 1941 in the imperial cruiser? Joseph Stalin forms an alliance with Darth Vader?? Imperial stormtroopers with Red Army heroically fighting against the soldiers of the Wehrmacht??? This plot has the 99.9% chance of being monstrous graphomania. And only one hundredth percent to be thin, but very thin ice, parody for the books about " meeting with Stalin" and science fiction in the spirit of Star Wars. But the most amazing thing is that at some point this provocative ironic burlesque balancing on the edge between farce and trash becomes more than just a parody. and the author, without changing facial expressions, begins to talk about serious things .. As you know, Russia has two options - either we fix everything ourselves, or wait for some aliens to help. Surprisingly, the most surrealistic option is the first one. So, the Dubcheck's book isn't a fantasy, fantasy is what our past was. But maybe it will help make our future better" -Sergey Lukyanenko
And Sergey Lukyanenko is a famous sci-fi writer himself. He is also a pro-war pro-Putin scumbag, but It doesn't make him incapable of being a good critic.