Illinois Civil War Muster and Descriptive Rolls Database (Illinois State Archives):
Sonday, Meyer William - Pvt - Co D - 4 IL US CAV
Join, 18Aug1861; Age, 28
Reenlisted as a veteran
American Civil War Soldiers (ancestry.com)
Myer William Sonday - Pvt - co D - 4th Cavalry Regiment Illinois
Residence, Joliet, Illinois; Enlisted, 18Aug1861
Reenlisted, 19Mar1864
Trans to Co E, 14Jun1865
Trans Co D, 23Jun1865
Trans in Co M, 12th Cavalry Regiment Illinois, 23June1865
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: