A planned method or set of actions (tactics/strategy) designed to achieve a goal in battle, business, negotiation, etc.
会議で新しい販売作戦を発表した。
He announced a new sales strategy at the meeting.
相手チームの作戦を読んで守備を変えた。
We read the opposing team's tactics and changed our defense.
問題を小分けにして取り組むのが効果的な作戦だ。
Breaking the problem into smaller parts is an effective strategy.
A military operation: a concrete plan of action for deploying forces to achieve objectives (land, naval, air operations).
連合軍は夜間に奇襲作戦を行った。
The allied forces carried out a surprise night operation.
海上作戦の準備に数週間かかった。
It took several weeks to prepare for the naval operation.
作戦は天候次第で変更されることがある。
Operations may be altered depending on the weather.