THE ROMAN WORLD AT ITS HEIGHT 11
subduing a region, the army confiscated whatever money was at hand, carried
away whatever portable property they desired, divided up the choicest bits of real
estate they fancied, and sold into slavery the prisoners of war they had captured.
War was a highly profitable business. Because of the natural wealth inherent in
continental Europe, inland Egypt, and the Near East (the three main sites of Roman
aggression—the first taken largely by Caesar and Claudius, the second by Au-
gustus, and the third by Hadrian) the army’s success in pushing the Roman fron-
tier forward brought in enormous amounts of money that, until the later decades
of the second century, more than compensated for the cost of the warfare itself.
The army as a rule did not permanently occupy the lands it had conquered.
To do so might have prolonged local resentments; but permanent occupation was
also unnecessary, given the ease of transporting soldiers across the sea. A more
commonsense approach called for conquering a region, redrawing the local ad-
ministrative practices along Roman lines (although usually keeping the local elites
in power), then withdrawing the troops at the first available moment. They could
always return quickly enough, if events warranted it. For this reason, a permanent
military presence is a remarkably reliable indicator of where the trouble spots
were. Continental Europe, as it happened, had the longest, largest, and most per-
manent network of garrisons. Resistance to Roman power had been strong, but
the main threat to stability came from the difficulty of administering so vast an
expanse of land. The sedentary rural populace did not experience the daily inter-
action with other cultures that the south did, and this meant that they were more
resistant to “Romanization.” And since troops could not deploy with the same
ease that they could in the south, the only alternative was permanent settlement.
The greatest concentration of troops existed along the furthest borders of the em-
pire; but a careful network of smaller military camps stood behind them, stretching
from the Atlantic opening of the Loire to the mouth of the Danube at the Black
Sea.
The army’s significance rested upon more than its record of battlefield victo-
ries, for the army was the single most important instrument for “Romanizing” the
conquered peoples and turning them into peaceful elements of a stable society.
The army accomplished this transformation by charting a new direction in social
engineering. Earlier empires, such as the Athenians of the fifth century b.c., had
steadfastly maintained a separation of the conquerors and the conquered, and
ruled over their realms with very little interaction with their subjects. Roman prac-
tice was different. They enlisted soldiers from all ethnic groups throughout their
empire—Italians, Egyptians, Celts, Dacians, Hibernians, Libyans, and more—and
used them to help bring Roman culture to the provinces. Soldiers learned to speak
Latin, to know and obey Roman law, to practice Roman religion. Soldiers served
for twenty years, during which time they were stationed in province after province
(but almost never in their native territory), were encouraged to intermarry with
local women, and at the end of their service received a handsome severance pay-
ment of cash and/or land. This practice produced two important results. First, the
empire had a steady stream of volunteer recruits attracted by the opportunity to
make money, see the world, receive an education, earn an honored place in society,
and retire at an early age with land to farm and money to fund the operation.
(The empire at its height boasted of a military force, including auxiliaries, of three
hundred thousand men.) Second, army service had the intended effect of eroding
an individual soldier’s sense of identification with his native ethnic group and of
inculcating his self-definition as a “Roman”—that is, as a member of a society and
civilization that was larger than mere ethnicity. To be a citizen of the empire