Stimulant use has been a feature of some military operations. Caffeine, amphetamines were used by German, British, American, and Japanese forces during WWII, both for their fatigue-ameliorating effects and for their effects on mood and morale. The US Air Force (USAF) officially sanctioned amphetamines to promote alertness in selected aircrew within the Strategic Air Command (SAC) in 1960 and within the Tactical Air Command (TAC) in 1962. The US military maintains a stimulant policy while most of its allies do not allow use of stimulants to maintain/restore performance and manage fatigue. A review of international military service policies reveals a variety of policies on pharmacological fatigue management. Force Health Protection (FHP) is defined specifically as "an organized program of healthcare preventive or therapeutic treatment, or preparations for such treatment, designed to meet the actual, anticipated, or potential needs of a group of military personnel in relation to military missions".