奇き襲しゅう作さく戦せん

noun

surprise attack operation; surprise tactics

Refers to a planned military or strategic operation that relies on the element of surprise.

• 敵てきは夜よ明あけ前まえに奇き襲しゅう作さく戦せんを開かい始しした。

  The enemy launched a surprise attack operation before dawn.