What year did Opha Mae Johnson become the first female Marine?

Opha Mae Johnson became the first female Marine in 1918, marking a significant milestone in the history of the United States Marine Corps and the integration of women into the military. This year is notable because it coincided with World War I, which led to an increased demand for personnel to support the war effort. The establishment of the Women's Reserve allowed women to take on various roles within the Marines, breaking traditional gender barriers at the time. Opha Mae Johnson's enlistment paved the way for future generations of women in the military, symbolizing progress in gender equality within the armed forces.