There is a true story?

[LuckyBlackCatXIII]

As said there's a lot of places, events and people that are used in the game, such as Sir William Smith (who did really die in 1839 [but not in the right month that the game states]), the Order of the Black Eagle and the 'Occupation' of Napoleon that Alexander states in one of his memory cylinders, but they're most likely not true. I have to give props to Frictional though, they added a lot of historical figures and events to make this seem almost plausible.