On the back of this sign is some history of the family who owned this land. At the time of the Civil War the owner was Henry Clay Fitzpatrick, grandson of Bath County, Virginia, native John Fitzpatrick, a Revolutionary War veteran who established a farm here sometime before 1800.
The Historical Marker Database provides the rest of the story, including this summary:
The Battle of Middle Creek At this site, on Jan. 10, 1862, Union troops under Col. James A. Garfield defeated Confederates led by Gen. Humphrey Marshall. Garfield's 1,100 Ohioians and Kentuckians advanced up Middle Creek and clashed with Marshall's 1,967 Virginians and Kentuckians.The Union victory here enhanced the reputation of Garfield, who was promoted to brigadier general. Eventually he became president in 1881. His biography on Wikipedia is worth reading.