In this era of rapidly advancing technology, debate about aerial surveillance abounds. In March of this year, the Pentagon released its 2015 Inspector General report entitled “Evaluation of DoD’s Use of Unmanned Aircraft Systems (UAS) for Support to Civil Authorities,” which revealed that the Pentagon had flown spy drones over the U.S. for non-military purposes. Historically, the drone had been used primarily by the military in war zones, but with increased availability and applicability here at home, UAS use has expanded to include public agencies, commercial entities, and private citizens. Surveillance by air, however, is not a new concept. The strategy dates back to the French Revolution during which the French Army formed balloon companies to observe the enemy. Nearly 70 years later, during the Civil War, both Union and Confederate armies would experiment with tactical air power through the use of balloons for battlefield reconnaissance. The experiment found little support or practical utility, but the efforts of balloonists John La Mountain and Thaddeus Lowe were pioneering and spurred further innovations. [excerpt