Seth Dunham Bennett was a resident of Mansfield on August 29, 1861 when he enlisted as a Private in Co. B of the 7th Regiment Connecticut Volunteer Infantry. He was discharged September 12, 1864, time expired.

He was born May 27, 1840 in Mansfield to William and Harriet (Dunham) Bennett. In the 1860 U.S. census in Mansfield, he is a 20 year old teacher in the household of William Bennett. Two of his brothers, George D. Bennett and Theodore F. Bennett also served in the Civil War from Mansfield; they were both in Co. D of the 21st Regiment Connecticut Volunteer Infantry. 

Seth Bennett was a 30 year old teacher living in the household of his brother John Bennett in Marietta, Marshall County, Iowa by the date of the 1870 U.S. census. He moved to Polk, Canada County, Nebraska by the 1880 U.S. census date. He married Laura ____ between 1870 and 1880. In the 1890 Veterans’ census, Seth D. Bennett was residing in Rising City and Reading in Butler County, Nebraska. He was a member of G.A.R (Grand Army of the Republic) Post 20.102 in Nebraska.

On July 14, 1882, he applied for an invalid pension, No. 454,792 that was granted under certificate No. 249,323. His widow later filed application for a pension.

Seth D. Bennett died on February 24, 1893 and is buried at the Circle Mound Cemetery in Rising City, Nebraska, Lot 77, Section B.