Severance lists him as Charles W. Stewart, but findagrave.com and Faces of the Battle of Resaca (http://www.resacabattlefield.org/FoRFaces.htm) list him as William C., and match Severance as far as death date, rank, regiment, and that he was killed in action at Resaca.
1st Lieutenant in Co. E., 23rd Regiment, Michigan Infantry Volunteers. Was killed in action at Resaca, Georgia, May 14, 1864 (Severance, B. Frank. Genealogy and biography of the descendants of Walter Stewart of Scotland and of John Stewart who came to America in 1718 and settled in Londonderry, N.H. Greenfield, Mass. : T. Morey & Son, 1905, pg. 127-128).
1ST. LT. WILLIAM C. STEWART
CO. C. 23RD. MICHIGAN INFANTRY
ENLISTED, SEPT. 12, 1862
TRANSFERED AND PROMOTED TO 1ST. LT., DEC. 17, 1862
D. MAY 14, 1864
B. 1839 (findagrave.com)
At Resaca, on May 14, 1864, the 23d, commanded by Col. Spaulding,
still in the 2d brigade, then commanded by General Hascall, and belonging
to General Judah s division (2d) of the 23d corps, with its brigade, engaged
the enemy, and took a most gallant part in assaulting his strong position
at that point, losing heavily.
Colonel Spaulding, then in command, in his report makes the following
mention of the services of his regiment in that affair :
"An assault on the enemy s works was ordered. The assaulting column
was formed in three lines, this regiment being in the second line, advancing
over an open field within easy rifle-shot of the enemy s position, under a
terrible fire of musketry and artillery. The regiment in advance of the
23d broke, and was driven back, and the one in our rear followed them.
We pushed forward until we reached a deep creek, which it was impossible
to cross, and held our position until ordered back. In this advance the
regiment lost 62 killed or wounded. Lieutenant William C. Stewart was
among the killed." (Charles Lanman. The red book of Michigan : a civil, military and biographical history
Publisher: Detroit : E.B. Smith & Company ; Washington : Philp & Solomons).
findagrave.com has death date as March 27, 1903, but obituary verifies March 25.
1st Lieutenant in Co. E., 23rd Regiment, Michigan Infantry Volunteers. Was killed in action at Resaca, Georgia, May 14, 1864 (Severance, B. Frank. Genealogy and biography of the descendants of Walter Stewart of Scotland and of John Stewart who came to America in 1718 and settled in Londonderry, N.H. Greenfield, Mass. : T. Morey & Son, 1905, pg. 127-128).