Charles H. Williams was a resident of Mansfield on January 5, 1864 when he enlisted as a Private in Co. D of the 1st Regiment Connecticut Volunteer Heavy Artillery; he was transferred to the 7^th Regiment Veterans Reserve Corp on December 30, 1864. Charles Williams was discharged on July 20, 1865.

He was not living in Mansfield in the 1860 U.S. census; no further information is known.

On June 25, 1892, he applied for an invalid pension under No. 1,118,556 that was granted under No. 853,718.