My character is a WW1 private (English army) who has been taken and turned by a vampire. Abandoned by his original attacker, he's approached by a new one, a friendly vampire. However, he blames all of the race for his new, confusing and horrific condition and is very hostile towards him.
My character wants to use 'fuck off!' and/or also 'fuck you'.
Would this be a realistic use of the word 'fuck' in an expletive, or is it a more modern phrase?
If the phrase wasn't around in 1914+, is there another equivalent expletive I could use?
I've searched for the use of swear words and the etymology of them through the ages. This tells me that the word in question was in use - had been, for many centuries! - but none of the references give examples of it in the context of a phrase.
I'm currently searching memoirs of the time, but soldiers were reluctant to write down swear words, even if they may have used them in their daily life.
Any help very gratefully received!