In the early days of the First World War, only bombers went aloft at night--small fast landing fighters were considered too difficult to fly in the darkness. But, by the winter of 1917, daring pilots began using them against raiding Gothas and Zeppelins over England. Soon, two squadrons of Sopwith Camels went to France and prowled the night skies seldom with effective results for the enemy was almost impossible to locate in the blackness.