Enlisted in to Company E of the 105th O.V.I. on 1862-Aug-12 at age 21 as private. He was captured at the Battle of Chickamauga on 1863-Sep-19. He died 1864-Oct-18 at the infamous Andersonville prison and is buried in Andersonville National Cemetery at Andersonville, Georgia. 
EDITOR JEFFERSONIAN DEMOCRAT: -- Enclosed I forward you an official report of the casualties in the 105th O. V., in the engagement near Chattanooga, Sept. 20th. The report was made to include the 26th Sept., and no doubt would be materially changed if made to include to the present date, as I am informed by A. Adj't Gen. Wm. R. Tuttle, the exchange of wounded commenced on 30 inst., 500 being brought off in one train, most of whom were able to sit up in the ambulances. The Rebels claim to hold 2,000 of our soldiers that would bear transportation inside our lines. ...
Report of casualties in the 105th Reg., Ohio Vol. Inf., during the engagement of the 19th and 20th of Sept., near Chattanooga, Tenn.: ...
... Among the prisoners in Richmond from the 105th O. V. M., was Woodard, Co. F, now here, with myself, paroled. Among those left back in prison, Marsh and Serg’t Brown, Co. F; Wm. Dayton, Co. E; Corp. Finney, and a private of Co. B, were all that I saw. While there, Greenbacks could be sold to the guard one dollar for fifteen Confederate. The Rebels appeared rather gloomy over the prospects before them, and many of them told me they did not want to fight any longer, and declared that their cause was hopeless. If I had not been paroled at the time that I was, I should have escaped with a Rebel Sergeant, who was going to pilot me through to our lines. You may give this a place in your paper if you please. Although badly written as it should is, every word of it is true, as thousands are willing to testify, and, as for myself, I am out of hell, and if I thought the other place was as bad, my life in the future should be altogether different. — Yours, James A. Mowrey
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXQ9-G6G : 12 April 2016), Wm Dayton in household of Frederick Dayton, Burton, Geauga, Ohio, United States; citing family 77, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Civil War Soldiers Index, 1861-1865," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FS5W-SJC : 4 December 2014), William Dayton, Private, Company E, 105th Regiment, Ohio Infantry, Union; citing NARA microfilm publication M552 (Washington D.C.: National Archives and Records Administration, n.d.), roll 25; FHL microfilm 882,238.
"United States Civil War Soldiers Index, 1861-1865," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FSMY-B28 : 4 December 2014), William Daton, Private, Company E, 105th Regiment, Ohio Infantry, Union; citing NARA microfilm publication M552 (Washington D.C.: National Archives and Records Administration, n.d.), roll 25; FHL microfilm 882,238.