There are two aborted attempts at such a crossover that I know of. Both were very promising.
Worldwar: Accounts Frozen by GBW
Worldwar 191 by General_Finley
I've been toying with the idea of giving this concept a go myself, but I think I might need to re-read the TL-191 series first to refresh my mind. This assumes that neither author above intends to continue their TL -- I don't want to step on any toes. I'd also want to differentiate it from my own Worldwar TL. Maybe I'll kill off Straha early on.