My great grandfather Peter Larro of Kankakee, Illinois signed an Oath of Allegiance as follows:
"Office of Assistant Quartermaster, Department of Missouri, St. Louis, Oct 21, 1862.
I hereby certify that Peter Larro took the Oath of Allegiance to the Government of the United States, before me this 21st day of Oct 1962.
George C. Clark, Notary Public, St. Louis, Mo."

This would seem to indicate Peter Larro was a member of the Union forces, though I can find no trace of him in any Civil War roster; yet I have found his brother John Laro's service with the 20th IL Infantry.

I have also been unable to find out any information about George C. Clark, Notary Public, St. Louis in the 1860-1870 time period.

Does anyone know the implications of having taken this oath in St. Louis? Is it indeed the oath that all Union solders were required to take?

Does anyone have any information about George C. Clark, Notary Public during this timeperiod?