Miller, a Christian gentleman and a man of energy, lived most of his early life in Calico Township, Lancaster, Pennsylvania.

During mandatory enlistment into the Pennsylvania Militia, he was assigned to the 5th Company of the First Regiment of Pennsylvania on May 1, 1777, at Red Bank. Later, Miller took the Oath of Allegiance on November 3, 1778, with the Lancaster County Militia, 3rd Battalion under Captains Joseph Gehr and Andrew Ream. Miller was a Private in the Continental Army.

After the Revolutionary War, Miller settled down and married Mary Maria Miller. They had eight children: Joseph, Catherine, Elizabeth, Susanna, John, Peter, Christina and Barbara. Miller moved to the eastern part of Bedford County in the Pine Forest near Coleman’s Station about 1782 where he was a farmer and raised his children.