D'Artagnan's role among the musketeers is one of leadership (his skills and brains impress the musketeers greatly), but he is also regarded as a sort of protégé given his youth and inexperience. Athos sees him not only as a best friend and fellow musketeer but nearly as a son. At the end of the series, his death at the siege of Maastricht is given an extra tragic twist – he is mortally wounded while reading the notice of his promotion to the highest military rank.