私し戦せん

noun

private war

A war waged by a private individual or group, not by a state. Often used in historical or legal contexts.

• 中ちゅう世せいヨーロッパでは、貴き族ぞくによる私し戦せんが頻ひん繁ぱんに起おこった。

  In medieval Europe, private wars by nobles occurred frequently.