During the American Civil War, Davis served a three-month enlistment in the 4th Ohio Infantry, and afterward in the 96th Ohio Infantry, until disabled and honorably discharged in the Vicksburg Campaign.

[1] Davis was admitted to the bar, and commenced practice after recovering from war injuries.

Davis was nominated by the Republican Party for Supreme Court Justice in June, 1899, and elected in November of that year.

Joseph Perry Bradbury resigned from the Court January 9, 1900, and Davis was appointed the next day to fill the seat by Governor Nash.

Harriet died August 2, 1901, and Davis married Jessie Myer of Columbus September 2, 1903.