Mary Edwards Walker worked as a battlefield surgeon.
Explanation:
Dr. Mary Walker was the women’s rights advocate. She was the woman who was awarded the Congressional Medal of Honour for the first. The medal was cancelled before two years of her death as there was a period of confusion regarding right recipients of the award.
The “Congressional Medal of Honour” was awarded to Dr. Walker for her work during the Civil War in 1865. She was the woman who received the award for the first time in 1917, her name was eliminated from the list of honor, along with others, when the terms were reviewed for the eligibility of the award.