Which Service does NOT have WOs?

The Air Force is the branch that does not have Warrant Officers (WOs). In 1959, the Air Force abolished the Warrant Officer rank and integrated their responsibilities into other ranks, primarily non-commissioned officers (NCOs) and commissioned officers. This decision was driven by the evolving needs of the Air Force and a desire to streamline command structures.

In contrast, the Army, Marine Corps, and Navy all retain Warrant Officer ranks as part of their personnel structure. Warrant Officers in these branches serve as specialists and technical experts in their fields, bridging the gap between the enlisted and commissioned officer ranks. Each of these services has a system for appointing and utilizing Warrant Officers for unique roles and responsibilities, reflecting their critical contributions to military operations.