Who is known as the first woman to serve as a Marine?

Opha M. Johnson is recognized as the first woman to serve as a Marine. She enlisted in the U.S. Marine Corps Reserve in 1918, during World War I, marking a significant milestone in military history as she became one of the first women to join the ranks of the Marine Corps. Her pioneering role paved the way for future generations of women in the military, and she set a precedent for the inclusion of women in the armed forces.

The other individuals listed, while notable, were not the first to serve in this capacity. For instance, Margaret A. Brewer became the first female general officer in the Marine Corps but did not serve as the first woman Marine. Ruth L. Wood and Ann Elizabeth Hutton were also significant figures in the Marine Corps, but they entered service after Opha M. Johnson's groundbreaking enlistment.