Palmyra is an unincorporated community in Montgomery County, Tennessee. It is located along State Route 149, southwest of Clarksville. The town has its own post office with the ZIP Code of 37142. Palmyra has a rich Civil War history with Major General Joseph Wheeler of the Confederate army took position on the Cumberland River in late January 1863. His plan was to disrupt Union ships going to Fort Donelson at Dover, a few miles west of Palmyra. Aware of Wheeler's intentions, the Union did not send any ships up or down the river, forcing Wheeler to attack Fort Donelson with his cavalry division.