The first battle won thanks to control of the skies took place at Fleurus during the French Revolutionary Wars (1792-1802). The French first deployed L'Entreprenant, a manned hot-air balloon in 1794. It flew above the range of enemy muskets and cannons and from its vantage point, the first aeronautic corps of the French army kept track of enemy troop movement to great advantage. The corps returned to action in various battles, but was never a replacement for using cavalry in reconnaissance, and was later disbanded by Napoleon.
Read more at Suite101: Balloons in Early Warfare: A Brief History of Wartime Use of Balloons Before WWII
http://militaryhistory.suite101.com/...#ixzz0eW8KD2Ki