Objectives, Strategy, and Tactics
Just so we’re on the same page about these terms...
Objective: “Destroy the Death Star.”
Strategy: “Take the Empire off guard by sending an absurdly small force to exploit a critical vulnerability.”
Tactics: “Send 3 small squadrons of x-wings. Get close to surface of the space station and head for the exhaust port. Stay deep in the approach trench to avoid surface guns. Once the TIE fighters show up, have two x-wings flank the leader and defend against enemy fire...”
(So... when Luke shuts of his targeting computer in favor of using The Force, he was making a tactical decision. The strategy and objective were unchanged.)