noun
Refers to a professional soldier hired to serve in a foreign army, often for financial gain. Neutral term, but can carry a negative connotation depending on context.
彼は傭兵として戦場に赴いた。
He went to the battlefield as a mercenary.
中世ヨーロッパでは傭兵がよく使われた。
Mercenaries were often used in medieval Europe.