Tactics, Strategy, Operation
noun
When you make war, you're building it up like you'd build a building. You have to make strategy, you have to plan, you have to come up with awesome tactics for your operation.
さくせん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
明日のゲームのための作戦を立てました。
I planned some tactics for the game tomorrow.
私たちの作戦はスパイに知られてしまった。
Our strategy has been leaked to the spies.
プロポーズは作戦通りにはいかなかった。
The proposal did not go according to the strategy.