Usage patterns
作戦を立てるto devise a strategy/plan
The team devised a new strategy before the match.
作戦を練るto work out/refine a plan
The coach worked out the strategy with the players.
作戦を実行するto carry out an operation/plan
The army carried out the operation at dawn.
作戦が成功するfor a plan/operation to succeed
This operation succeeded splendidly.
作戦に出るto resort to a (particular) tactic
He resorted to an unexpected tactic.