History shows us that there were a large number of women who served in the ranks during the Civil War, including Dr. Mary Walker.
Below is a short article about this amazing woman.
Dr. Mary Walker Looks Like a Gentleman of the Old School
This is Dr. Mary Walker, the famous advocate of men’s clothes for women as she looked when making a recent call on President Taft. She was a surgeon throughout the Civil War and adopted men’s clothes for convenience, comfort, and health in the field. A special act of Congress enabled her to wear the clothes she chose. She recently has been living at Oswego, New York.
Source: The day book. (Chicago, Ill.), 04 Jan. 1912.