In the late-nineteenth century, a former spy for the Union Army lived in La Porte. The most remarkable fact about this person is that the spy was a woman who posed as a man so that she could join the Union army during the Civil War. Her birth name was Sarah Emma Evelyn Edmonson (sometimes listed as Edmondson). She joined the 2nd Michigan Volunteer Infantry under the alias Frank Thompson. She became a spy and completed 12 secret missions behind enemy lines, using various disguises.