Strategy differs from tactics, in that strategy refers to the employment of all of a nation's military capabilities through high level and long term planning, development and procurement to guarantee security or victory. Tactics is the military science employed to secure objectives defined as part of the military strategy; especially the methods whereby men, equipment, aircraft, ships and weapons are employed and directed against an enemy. Strategy focus on how to win a war through a series of battles and campaigns, tactics focus on how to use the available means to win the battlefield.