Alexander : a history of the origin and growth of the art of war from ...

180 FIELD FORTIFICATION.machines nevertheless were capable ofdoing remarkably efficientwork.Field fortifications were rarely employed by the Greeks-These were usually confined to the defense of defiles, and,except to surround the camps, were never used in the plains.Pent-House and Kam picked up by Tongs.Indeed, the Greek camps were by no means so admirablyfortified as they were in later centuries by the Romans.Still,the Greeks in front of Troy fortified their camp, and on oneoccasion it saved them from disaster, and there are many laterinstances of temporary intrenchments. But their use, as weunderstand them to-day, was unknown.