THE LAST ADVANCE
 WHEN Tacitus speaks of the urgentia imperii fata, the irresistible destinies of empire, he uses a phrase
which every Englishman understands. A great empire cannot stand still. Its adventurous subjects are always
pressing forward, and must be protected. Its neighbours are continually feeling and resenting the pressure
which it exercises upon them. It has to defend boundaries which represent to those who are outside them a
series of aggressions, and it has to satisfy the warlike tastes of the huge force which it has to keep under
arms. Augustus had done his best to limit the growth of the Empire. His testament to his successors was an
injunction, it would be better, perhaps, to say a counsel, that no new dominions should be sought. Tiberius
religiously observed this advice. But the
 Cęsars that followed Tiberius found the circumstances of the situation too much for them. Caligula made an
expedition against the nations yet unsubdued beyond the northern frontier, which might have been serious but
for his own lunatic folly. Claudius began the subjugation of Britain, which was carried to a conclusion by the
brilliant generalship of Agricola in the reign of Domitian.
Domitian was not so fortunate in his other great
enterprise. This was the invasion of Dacia. Agricola was still alive, but Domitian was too jealous of his
abilities and his renown to entrust to him the management of the campaign. He found a substitute in the person
of Cornelius Fuscus, Prefect of the Prętorians, who had at least the recommendation of being a subservient
courtier. Juvenal includes Fuscus among the counsellors who were summoned to discuss the important question of
how the gigantic turbot which a fisherman had presented to the Emperor should be cooked. He seems to have been
a student of the military art, for he is described as "planning battles in his marble halls." Possibly he
wrote a book on the subject. In the field he seems to have had little or no capacity. The Dacian chief,
Decebalus by name, enticed the Roman general to cross the Danube, turned
 on him when the opportunity came, and defeated him with the loss of at least one legion and its exile. We have
absolutely no record of the battle. It came within the period of events covered by the histories of Tacitus,
but the book which contained the narrative is lost. Even did we possess it, we should still be ignorant of one
important detail, for Orosius, who had the narrative before him, tells us that Tacitus held it to be the part
of a good citizen to conceal the losses suffered by the armies of Rome. The whole story is wrapped in
obscurity. It is said that the defeat of Fuscus was retrieved in the next campaign by his successor Julianus.
But again we have no details. There is even to be found the statement, whether well or ill-founded we cannot
say, that the Dacians exacted from Rome an annual sum of money as the price of their forbearance.
It was to Dacia then that Trajan turned his thoughts when he found himself seated on the imperial throne.
Trajan had many reasons for undertaking the enterprise. It was much to his taste. He was a soldier, who had
already distinguished himself in the field. And he had to justify his elevation to the throne. The Empire
really rested on the swords of the
 soldiers, and no man who could not count on the respect of the army could feel himself safe. And there was
also the cogent reason that it was easier to attack than to defend, that the barbarians, if left to
themselves, would sooner or later invade the Empire, and that the wisest plan would be to assume the
TRAJAN BESIEGING A DACIAN FORT.
Trajan was busied with protecting the German frontier of the Empire when he received the news that he had been
adopted by the aged Nerva. He spent a year, after receiving the tidings, in completing the preparation for its
defence. Then he went to take up his new dignity. Home affairs settled, he started for the Danube. Of the
campaigns which followed we know little in one way, and much in another. We know, from the sculptures on
Trajan's Column, exactly what arms and armour, and what engines of war were used by the soldiers of Rome. But
as to the strategy of the campaign, and its chief incidents, we are almost wholly in the dark.
Trajan crossed the Danube at two places without molestation. At first it seemed as if the Dacians were going
to give in without a struggle. An embassy arrived to beg for peace, offering surrender without conditions. But
this was a palpable imposture. The envoys
 were men of low rank—so much Trajan knew from the habits of the country—for they were bareheaded.
The next envoys were certainly nobles, but they had no real authority to treat. The Dacian king, Decebalus by
name, was simply trying to gain time. Not long after he fell upon the legions as they marched. A fierce battle
followed, in which the Dacians were defeated, but at a heavy cost. The Romans still advanced; when they were
near his chief stronghold, Decebalus again gave battle. This time he was beaten even more decisively than
before. For the time his spirit was broken. The envoys whom he now sent were nobles of the highest rank, who
came into Trajan's presence with their hands bound behind their backs in token of absolute submission.
Decebalus himself consented to pay his homage to Trajan in person, and to send deputies to Rome to arrange
conditions of peace. This was in 102 A.D.
Scarcely had Trajan turned his back—his presence being much wanted at Rome—when the Dacians were
in arms again. Decebalus's own hereditary kingdom lay far to the east, in what is now called Transylvania, but
nothing could stop the march of the Roman legions. They made their way over river and mountain,
 and stormed stronghold after stronghold. At last Decebalus, in despair, put an end to his own life. The new
province of Dacia was thoroughly organised, for Trajan was as great an administrator as a soldier. To this day
the remains of the great works which his engineers and architects raised at his bidding remain to testify to
the completeness with which the work was done. For more than a century and a half it remained one of the most
orderly and civilised of the Roman provinces. It was not till 275 A.D. that Aurelian
withdrew the legions to the southern bank of the Danube.
During the time of the Good Emperors
Rome kept her dominions unimpaired. Even under their weaker successors, though decay was at work within, her
power for awhile was not visibly shaken. It was with the appearance of the Goths upon the scene that the end
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