Highlight the white text inside the block for hints ranging from vague to specific...
It's helpful to read the clues starting from the end to the beginning as Clue #6 will give you solid information to help you solve the puzzle.
D'Artagnan is not facing the single soldier.
Marcel and Henri are probably close friends in real life.
Aramis is facing the most soldiers.
The full setup of who is fighting who is found in the next block of text. If you do not wish to be spoiled, please do not continue.
Aramis is facing four soldiers (Emile Francois, Michel, & Pierre). Athos is facing three soldiers (Guy, Thomos, & Andre). D'Artagnan is facing two soldiers (Marcel & Henri), which leaves Porthos facing the single soldier (Jules). The keyword is "Jules".