In 1862 two Royal Engineers officers, who had seen balloons being used in the American Civil War, drew the attention of the War Office to the potential use of balloons for observation. These officers demonstrated balloons to the army, but it was only in 1878 that the War Office directed Captain James Templer, an army reservist and experienced balloonist, to set up a small unit of Royal Engineers which became known as the School of Ballooning.