which call for stern repression from the orderly community. Such
considerations go far towards explaining the military history of the
Romans, and it is a history with which, on the whole, we ought to
sympathize. In its European relations that history is the history of the
moving of the civilized frontier northward and eastward against the
disastrous encroachments of barbarous peoples. This great movement has,
on the whole, been steadily kept up, in spite of some apparent
fluctuation in the fifth and sixth centuries of the Christian era, and
it is still going on to-day. It was a great gain for civilization when
the Romans overcame the Keltiberians of Spain, and taught them good
manners and the Latin language, and made it for their interest hereafter
to fight against barbarians. The third European peninsula was thus won
over to the side of law and order. Danger now remained on the north. The
Gauls had once sacked the city of Rome; hordes of Teutons had lately
menaced the very heart of civilization, but had been overthrown in
murderous combat by Caius Marius; another great Teutonic movement, led
by Ariovistus, now threatened to precipitate the whole barbaric force of
south-eastern Gaul upon the civilized world; and so it occurred to the
prescient genius of Caesar to be beforehand and conquer Gaul, and
enlist all its giant barbaric force on the side of civilization. This
great work was as thoroughly done as anything that was ever done in
human history, and we ought to be thankful to Caesar for it every day
that we live. The frontier to be defended against barbarism was now
moved away up to the Rhine, and was very much shortened; but above all,
the Gauls were made to feel themselves to be Romans. Their country
became one of the chief strongholds of civilization and of Christianity;
and when the frightful shock of barbarism came--the most formidable blow
that has ever been directed by barbaric brute force against European
civilization--it was in Gaul that it was repelled and that its force was
spent. At the beginning of the fifth century an enormous horde of yellow