It's a Scoville - Info from owner, old township maps & Grave search info established ownership dating back to 1840s of the farm and military information on burials. Turns out the owner of the farm from 1884-1914 had a father (private) serving in the 1st Michigan, KIA in 1864 and burried in Nashvile, TN., finding his grave indicated his father, his father had 4 sons who served as well. Further, as the father died when the owner was a young boy, and well before he moved to the farm, and a private, he was ruled out. Of the 3 remaining, only 1 was a Sgt., lived nearby and died in 1902. The other 2 were privates and did not live nearby. The button provided info as to the rank of the owner, the insignia within the shield indicates its a "staff" button belonging to an officer, at least the rank of "non-commissioned". Deduction reduced the ownership to one possible relative, who lived nearby, lived until 1902, and fit as to his rank. He very likely visited his nephew from time to time and the local town nearby, (center for the township) would've offered opportunity for him to wear his uniform at events. The button was found in the front yard, near the driveway entrance as well certainly a pathway for visitors to the farm. Took some time sleuthing it but very confident of the ownership.