LeBeau was born Wigmuke Waste' Win (English: Pretty Rainbow Woman) in October 1919 in Promise, South Dakota on the Cheyenne River Indian Reservation.
[4] LeBeau served in France, England and Belgium under the 76th General Hospital unit, including at the Battle of the Bulge.
While there, she experienced racial segregation, including not being allowed to purchase certain products, such as vanilla extract, at the grocery store.
LeBeau served as director of nursing at the IHS facility in Eagle Butte, South Dakota.
[4] As a result of her medical career, she received the O. Marie Henry RNDNSC Chief Nurse and the Mable Ann Wagner Award.
[1] She also received a Senatorial Tribute by Senator John Thune and a quilt from the North American Indian Women's Association, an organization which she helped found.
[1][3] LeBeau supported the Remove the Stain Act in the United States Congress, which seeks to rescind the medals of honor awarded to American soldiers who participated in the Wounded Knee Massacre.