In military usage both tactic and strategy are the same.

Strategy is a set of choices used to achieve an overall objective whereas tactics are the specific actions used when applying those strategic choices.

In military usage, a military tactic is used by a military unit of no larger than a division to implement a specific mission and achieve a specific objective, or to advance toward a specific target.

The terms tactic and strategy are often confused: tactics are the actual means used to gain an objective, while strategy is the overall campaign plan, which may involve complex operational patterns, activity, and decision-making that govern tactical execution. The United States Department of Defense Dictionary of Military Terms defines the tactical level as "the level of war at which battles and engagements are planned and executed to accomplish military objectives assigned to tactical units or task forces. Activities at this level focus on the ordered arrangement and maneuver of combat elements in relation to each other and to the enemy to achieve combat objectives."