Katherine Stinson Otero, America’s “Flying Schoolgirl” crisscrossed the US and Canada in her plane to entertain crowds and sell Liberty Bonds. She ached to fly for the US Army but was forced to settle for driving an ambulance in France.
Elsie Janis, a famous actress, raised her own money to tour France to entertain the troops, whom she lovingly termed “my boys.” She once arrived at a show standing on the cowcatcher of a locomotive. (My Aunt Jan was named for Elsie.)
Library of Congress portal https://www.loc.gov/topics/world-war-i/