Fighter - a person who engages in combat for reward or enjoyment
Soldier - a person who engages in combat out of duty or obligation to the state
Warrior - a person who engages in combat as a fundamental part of his way of life
Artist - a person who engages in combat in the hope of perfecting combat to the point where it is no longer the means to the end

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"Battles are won by slaughter and maneuver. The greater the general, the more he contributes in maneuver, the less he demands in slaughter." - Sir Winston Churchill