出しゅっ征せい軍ぐん

noun

army in the field; expeditionary force

Refers to troops that have been dispatched to a front or campaign, often in a historical or formal military context.

• 出しゅっ征せい軍ぐんは遠とおくの戦せん地ちへ向むかった。

  The expeditionary force headed for a distant battlefield.