William Keough was a resident of Mansfield on September 8, 1861 when he enlisted as a Private in Co. B of the 10th Regiment Connecticut Volunteer Infantry; he was discharged October 7, 1864, time expired. According to his pension record, he may also have had service in Co. E of the 5^th United States Volunteer Infantry.

He was born on May 13, 1842 in Galveston, Texas to Michael J. and Jane H. (Hall) Keough; he was not living in Mansfield in the 1860 U.S. census. After his Civil War service, he moved to Michigan and he was enumerated in both the 1880 U.S. census and the 1890 Veterans’ Census in Jonesville, Michigan. William Keough worked as an engineer and he married Mary Elizabeth “Libbie” Ketchum before 1880. She died before September 29, 1913 when he married, second, at age 70, Emma M. (Jones) Leonard. There are no known children from either marriage.

On May 13, 1889, he applied for an invalid pension, No. 704,848 that was granted under certificate No. 473,414. His widow applied for a pension on October 23, 1914.

William Keough died on October 8, 1914 in Battlecreek, Michigan according to the Civil War pension index. He is buried at Section B 10 of the Sunset View Cemetery in Fayette, Michigan.