Webster's Revised Unabridged Dictionary · 1913

Aggression

Aggression ({not transcribed}) , noun

[Latin aggressio, from aggredi: compare French agression.]

The first attack, or act of hostility; the first act of injury, or first act leading to a war or a controversy; unprovoked attack; assault; as, a war of aggression. “Aggressions of power.” — Hallam