Illinois Civil War Muster and Descriptive Rolls Database (Illinois State Archives):
Shields, James - 2LT - Co F - 20 IL US INF
Promoted 1LT
Shields, James - 1LT - co F - 20 IL US INF
Residence, Joliet, Will Co, IL; Join, 13Jun1861; Age, 28
Rail Road Agent
Resigned at Birds Point MO, 26Feb1862
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):
Headstone Reading,Published Obituaries:
Additional Biographical Material: