Historical Units

リーグ

定義

歴史的に人または馬が1時間に歩く距離として定義された距離の単位で、英語圏では約4.8 km(3マイル)に標準化されることが多い。

解説

Leagues varied significantly by country and era: the Spanish legua was ~4.2 km, while the nautical league equals exactly 3 nautical miles (~5.556 km). Jules Verne's '20,000 Leagues Under the Sea' refers to horizontal distance traveled, not depth — 20,000 leagues is roughly 111,000 km, nearly three times Earth's circumference. The unit is no longer used in formal measurement but persists in literature.

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