|University of Virginia Digital Services Project - Leftwich Papers|
The University of Virginia Library has a digitization services project for the Joel Leftwich Papers and included the following information on their website:
"Joel Leftwich enlisted in the Virginia Militia on January 1, 1777 and fought through the Revolutionay War... . On January 19, 1809, he was elected Brigadier General of the Twelfth Brigade of Virginia Militia upon the death of General Joseph Martin and led this force to Fort Meigs in Ohio during the War of 1812.
The Leftwich Organization has a pedigree chart for Joel Leftwich here. More information about the Leftwich family from a DAR publication here.