When did the terms Medic and Corpsman first come into use?

The term "medic" has its origins in the Latin Word "medicus," meaning physician, and began to be widely used in military contexts during World War I. The term "corpsman," specifically referring to medical personnel in the U.S. Navy and Marine Corps, became prominent during World War II. Both terms have since become integral to military medical roles, evolving with the needs of armed forces throughout the 20th century.