Army Service Uniform: (ASU)
The Army Service Uniform (ASU) is the military uniform worn by United States Army personnel in situations where formal dress is called for. It is worn in most workday situations in which business dress would be called for, while the Army Combat Uniform is used in combat situations.
Army Combat Uniform: (ACU)
The Army Combat Uniform (ACU) and its flame-retardant variant, the Flame-Resistant Army Combat Uniform (FRACU), are the current battle uniforms worn by the United States Army.