The Virginia Flyover - McAfee Knob - Appalachian Trail

Question: In which Virginia locations did balloon observations prove especially useful for Union forces during the Civil War?

Answer: Thaddeus S. C. Lowe, an inventor experienced with hydrogen balloons who became head of the Union’s Balloon Corps and provided valuable aerial intelligence, orchestrated balloon views that revealed the Confederate evacuation of Yorktown and supplied important intelligence during the Battle of Fair Oaks in Virginia.