act that benefits the enemy
A formal or legal term for actions that aid the enemy, often used in military, espionage, or wartime contexts.
スパイが利敵行為を行ったとして逮捕された。
The spy was arrested for committing an act that benefited the enemy.
戦時中、利敵行為は重罪とされた。
During the war, acts benefiting the enemy were considered serious crimes.