Etymology

battalion

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Today it means: An army unit having two or more companies, etc. and a headquarters. Traditionally forming part of a regiment. Full definition →

Middle French battaillon
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The story

  1. Middle French · borrowed frombattaillon
  2. English todaybattalion

From Middle French battaillon (modern French bataillon).

Etymology from Wiktionary, CC BY-SA 4.0.