David D. Wadsworth
Illinois Civil War Muster and Descriptive Rolls Database (Illinois State Archives):
       Wadsworth, David D. - SGT - Co F - 20 IL US INF
        Residence, Joliet, Will Co, IL; Join, 13Jun1861; Age, 28; Born, Aurora, Erie Co, NY
        Height, 5- 9-1/2"; Hair, brown; Eyes, blue; Complexion, light; Single; Watchmaker
        Promoted to 1LT 05Mar1862
       Wadsworth, David D. - 1LT - Co F - 20 IL US INF
        Residence, Joliet, Will Co, IL; Join, 05Mar1862; Age 28; Born, Aurora, Erie Co, NY
        Height, 5' 9-1/2"; Hair, brown; Eyes, blue; Complexion, light; Single; Watchmaker
        Promoted Captain
        Wadsworth, David D. - Cpt - Co F - 20 IL US INF
        Residence, Joliet, Will Co, IL; Join, 27Jun1863; Age, 28; Born, Aurora, Erie Co, NY
        Height, 5' 9-1/2"; Hair, brown; Eyes, blue; complexion, light; Single; Watchmaker
        Resigned 1864
American Civil War Soldiers (ancestry.com)
      
Civil War Soldiers & Sailors System Search Detail (National Park Service):
        
National Graves Registration Database (Sons of Union Veterans of the Civil War):
      
Will County Illinois USGenWeb Necrologist Reports (© 2002 The ILGenWeb Project All Rights Reserved):

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