By Arnold Blumberg

From the late 3rd century bc to the 3rd century ad, Roman troops on campaign built a defended camp at their resting place each night. Carefully detailed and prearranged in their location and manner of construction, these bivouac marching camps were made to accommodate the headquarters, personnel, animals, baggage, and camp followers of whatever military-sized formation was to be housed within. Today, a camp of this nature is referred to by historians as a Roman marching camp.

 Very seldom does the literature of the classical Greeks mention camps.  Even in the case of Alexander the Great and his successors, the strengthening of a camp is only touched upon under special circumstances, the implication being that it was not done otherwise. Supporting this contention is a passage by the ancient historian Polybius expressly stating that the Greeks, in order to save themselves the trouble of entrenching, sought out terrain with natural protection for their campsites.

Even the Romans did not employ fortified camps during their expansion on the Italian peninsula between 389 and 281 BCE. It was not until they encountered King Pyrrhus of Epirus and his Macedonian-type phalanx and Thessalian and Epirote cavalry that they started to rely on marching camps as a protective device.