How to say "cavalry" in Japanese

• 騎兵きへいCommon
  nounCovers both the arm and the individual soldier, as in 'cavalry; cavalryman; trooper'. The most common choice; use it unless you specifically mean the unit as an organization.
• 騎兵隊きへいたい
  nounRefers to cavalry as a formed body or unit, the collective force rather than the individual rider. Less common than 騎兵; appropriate when speaking of a cavalry regiment or troop as such.
• 馬軍うまいくさ
  nounA marginal way to say 'cavalry', with an old-fashioned, literary flavor; seldom the word you want in ordinary contexts. Prefer 騎兵 or 騎兵隊 except when deliberately evoking historical or archaic usage.

Use 騎兵 for cavalry or an individual cavalryman, 騎兵隊 for a cavalry unit as an organized body, and 馬軍 only rarely, as an old-style word for cavalry forces.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 騎兵きへいcavalry
• 騎兵隊きへいたいcavalry
• 馬軍うまいくさcavalry