Sperrle's bombers did lay the foundations of a break-through. Loerzer and Grauert's air corps ordered their reconnaissance aircraft to range approximately 400 kilometres into French territory. They avoided the Sedan area so not to attract the attention of the French to German forces advancing on it, they carefully monitored the Allied reactions. Sperrle's air corps commanders targeted air interdiction operations and ordered, attacks on rail communications to prevent the westward deployment of the French Army from the Maginot Line and to pin down Allied reserves by disrupting communications across the Meuse. 26 French rail stations were bombed as were 86 localities from 10 to 12 May. Sperrle maintained the pressure on airfields—44 were struck on the 11–12 May. Loerzer and V. "Fliegerkorps", under Greim, also bombed road traffic around Charleville-Mézières.