/lit/ - Literature

I'm writing a story based on the Bosnian crisis of 1908 where the Austro-Hungarian empire annexed Bosnia and Herzegovina about a man who was given to an Imperial state orphanage as an infant as a part of a special secret program for unwed mothers to discretely deal with their shameful pregnancy, who was raised and trained to be a secret police agent and is sent to the newly annexed Bosnia in his first real independent mission in order to root out dissent and opposition and comes into conflict with the Serbian Black Hand.

My problem is I'm having a hard time capturing the specific level of historical accuracy in terms of the subtle details and world building. Should I just accept historical fiction inaccuracies, or should I try and make this a pseudo historical world of my own creation with entirely fictional nation states in a fictional historical time-line? I'm feeling the former as I want to mix influences from the 1890s to the 1920s