I would read it aloud, sound effects and all to judge length. Mentioning things taking place " today" might help. (ie. The tsar is passing through town tomorrow) I guess that would pre-suppose the audience is aware of the history.
I've read many fictions where there were actual wars going on. The hero of the tale may discuss actual battles, and be the hero of fictional ones to lend authenticity.
Best of luck.
BJ