the.com/musketeer

means A soldier armed with a musket — historically, infantry whose whole job description was 'carry this heavy gun and point it at the correct side.'

from From French mousquetaire, built on mousquet ('musket'), which itself traces back through French to the Italian moschetto — originally a small crossbow bolt, later a type of gun, and further back possibly tied to mosca, 'fly,' for the little dart-like missile. The three-friends, one-for-all swagger comes entirely from Dumas's 1844 novel 'The Three Musketeers' — the word was dry military hardware before he gave it a plume and a flair for dramatic oaths.