Mary Burns was an American woman who disguised herself as a man in order to fight in the American Civil War. She enlisted in the 7th Michigan Volunteer Cavalry Regiment in order not to be parted from her lover, who was in the same regiment. Her sex was discovered within a few days, before her company had left Detroit. She was arrested in uniform, held in the city jail, and charged with masquerading as a man. The account of the incident in the Detroit Advertiser and Tribune described the defendant as "a very pretty woman".