asl3d
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8 Zone of Operations The zone of operations in the North African campaign in Libya and Egypt consisted of a strip of land, sometimes as much as sixty kilometres wide, bounded on one side by the coast and on the other by the desert interior. The ground surface was either firm gravel, sand-covered gravel, or mixed sand and gravel. Within this entire zone, large parts of which were level plain, the desert could be traversed by all types of vehicles. The only exceptions were patches of deep sand, steep wadis and salty swamps, such as those at Marada. Natural sinuous defiles were formed at Derna and the Halfaya Pass at the border between Libya and Egypt. Undulating, steppe-like terrain predominated, which consisted of low mounds and long ridges, whose average height above the surrounding terrain was from four to twenty meters. At times, these ridges had gentle slopes, and at other times, they rose steeply from broad, level valleys in which there were no watercourses. The summits were naked rock covered with loose rocks of varying size, which made motor traffic difficult but not impossible. In the valleys, the rocky bottom was covered by a layer of dust or clay of varying thickness. In dry weather, this ground could be traversed without difficulty by vehicles with four-wheel drive that were capable of cross-country travel. The terrain had patches of camel's thorn shrubs, around which the dust had blown to form small dunes. Traffic followed the broad paths, called Trighs or Pistes, which connected the few settlements and water holes. The coast itself was fringed by a belt of dunes behind which was a zone of salt swamps, called Sebchen, which were usually dry. The only parts of the coast where there were no dunes were the cliff sections at Tobruk, Bardia, and Sollum. There, the coastal sector was often inter• sected by deep wadis and was difficult to penetrate. Toward the interior, the steppe-like zone gradually merged with the desert proper, which is practically devoid of any type of vegetation. On the whole, motoring was easier in the desert proper than in the steppe-like zone, although movement was rendered difficult in rugged areas.
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