James Fielding was a resident of Mansfield on February 3, 1862 when he enlisted as a Private in Co. L of the 1st Regiment Connecticut Volunteer Heavy Artillery. He reenlisted as a veteran on February 9, 1864 and was mustered out September 25, 1865 in Washington, D.C.

He was not a resident of Mansfield in the 1860 U.S. census.

On July 12, 1892, he applied from Maine for an invalid pension, No. 814,336 that was granted under certificate No. 584,579.

James Fielding was living in Togus, Maine when he was enumerated in the 1890 Veterans Schedule. No further information is known.