five years before

She was the daughter of the countess and Captain Treville, all she did was fight until she joined the Musketeers under a false name at the age of fifteen, then went to Savoy in 1625 age seventeen. (Post five years before the BBC program) ( A/N Never done a one shot so please give it a shot, this is a base for my full story of Natalia and Aramis that is why it is short.)