The man known as Franklin Flint Thompson to his fellow soldiers was really a woman - Sarah Emma Edmonds - one of the few females known to have served during the Civil War. Edmonds was born in Canada in 1841, but desperate to escape an abusive father and forced marriage, moved to Flint, Michigan in 1856, where she discovered that life was easier when she dressed as a man. Compelled to join the military out of sense of duty, she enlisted in the 2nd Michigan Infantry as a male field nurse, participating in several battles including Antietam, the First and Second Battles of Manassas, and the Vicksburg Campaign.
She is also said to have served as a Union spy and infiltrated the Confederate army several times, although there is no official record of it. One of her alleged aliases was as a Southern sympathizer named Charles Mayberry. Another was as a black man named Cuff, for which she disguised herself using wigs and silver nitrate to dye her skin. And yet another was as Bridget O'Shea, an Irish peddler selling soap and apples.
Malaria eventually forced Edmonds to give up her military career, since she knew she would be discovered if she went to a military hospital and her being listed as a deserter upon leaving made it impossible for her to return after she recovered. Nevertheless, she still continued serving her new country, again as a nurse, though now as a female one at a hospital for soldiers in Washington, D.C.
In 1865, Edmonds published her experiences in the bestselling Nurse and Spy in the Union Army, and went on to marry and have children. But her heroic contributions to the Civil War were not forgotten and she was awarded an honorable discharge from the military, a government pension, and admittance to the Grand Army of the Republic as its only female member.