As part of the deception surrounding Operation Crusader during the Siege of Tobruk, camouflage artist Steven Sykes built a dummy railhead near Misheifa in Egypt. The intent, which succeeded, was to divert German aerial attacks from the real railhead and deceive the Germans into believing that the British attack would not begin until the dummy was completed. Before the Second Battle of El Alamein, camouflage unit commander Geoffrey Barkas led Operation Sentinel and Operation Bertram, which used dummy equipment and other deceptive measures to deceive German commander Erwin Rommel about Allied strength and the timing and location of the Allied attack.