奇襲

surprise attack, sneak attack

kʲ i ɕ ɨː
奇 strange; unusual + 襲 attack
noun Rare #44,568
surprise attack, sneak attack Usually used in a military or strategic context.
JA: 敵は夜明けに奇襲を受けた。
EN: The enemy was hit by a surprise attack at dawn.

“奇襲であった”

It was a surprise attack.

— ラストエンペラー (1987)

彼らは敵に奇襲攻撃をかけた。

They launched a surprise attack on the enemy.

Sounds similar to