The Aircrew Badge, commonly known as Wings, is a qualification badge of the United States military that is awarded by all five branches of armed services to personnel who serve as crew members

Crewman

Crewman is a generic term for a crew member of an aircraft, naval vessel, military unit, or team of professionals attempting to accomplish a goal. In some science fiction , Crewman is the lowest military rank on board a spacecraft.The term "Crewman" may also be related in the non-gender specific...

 on board military aircraft. The badge is intended to recognize the training and qualifications required by aircrew of military aircraft. In order to qualify as an aircrew member and receive the Aircrew Badge, such personnel typically undergo advanced training in aircraft in-flight support roles.
The first version of the Aircrew Badge was issued by the Army Air Forces

United States Army Air Forces

The United States Army Air Forces was the military aviation arm of the United States of America during and immediately after World War II, and the direct predecessor of the United States Air Force....

 during the Second World War.