The History of Rome, Book V - Theodor Mommsen
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The Roman Policy with Reference to the German Invasion
The less the Celts, left to themselves, were a match for the Germans,
the more reason had the Romans carefully to watch over the complications
in which the two nations might be involved. Although the movements
thence arising had not up to the present time directly affected
them, they and their most important interests were yet concerned
in the issue of those movements. As may readily be conceived,
the internal demeanour of the Celtic nation had become speedily
and permanently influenced by its outward relations. As in Greece
the Lacedaemonian party combined with Persia against the Athenians,
so the Romans from their first appearance beyond the Alps had found
a support against the Arverni, who were then the ruling power among
the southern Celts, in their rivals for the hegemony, the Haedui:
and with the aid of these new "brothers of the Roman nation" they had
not merely reduced to subjection the Allobroges and a great portion
of the indirect territory of the Arverni, but had also, in the Gaul
that remained free, occasioned by their influence the transference
of the hegemony from the Arverni to these Haedui. But while the Greeks
were threatened with danger to their nationality only from one side,
the Celts found themselves hard pressed simultaneously by two
national foes; and it was natural that they should seek from the one
protection against the other, and that, if the one Celtic party
attached itself to the Romans, their opponents should
on the contrary form alliance with the Germans. This course
was most natural for the Belgae, who were brought by neighbourhood
and manifold intermixture into closer relation to the Germans who had
crossed the Rhine, and moreover, with their less-developed culture,
probably felt themselves at least as much akin to the Suebian
of alien race as to their cultivated Allobrogian or Helvetic
countryman. But the southern Celts also, among whom now
as already mentioned, the considerable canton of the Sequani
(about Besangon) stood at the head of the party hostile to the Romans,
had every reason at this very time to call in the Germans against
the Romans who immediately threatened them; the remiss government
of the senate and the signs of the revolution preparing in Rome,
which had not remained unknown to the Celts, made this very moment
seem suitable for ridding themselves of the Roman influence
and primarily for humbling the Roman clients, the Haedui. A rupture
had taken place between the two cantons respecting the tolls
on the Saone, which separated the territory of the Haedui
from that of the Sequani, and about the year 683 the German prince
Ariovistus with some 15,000 armed men had crossed the Rhine
as condottiere of the Sequani.
Ariovistus on the Middle Rhine
The war was prolonged for some years with varying success;
on the whole the results were unfavourable to the Haedui. Their leader
Eporedorix at length called out their whole clients, and marched
forth with an enormous superiority of force against the Germans.
These obstinately refused battle, and kept themselves under cover
of morasses and forests. It was not till the clans, weary
of waiting, began to break up and disperse, that the Germans appeared
in the open field, and then Ariovistus compelled a battle
at Admagetobriga, in which the flower of the cavalry of the Haedui
were left on the field. The Haedui, forced by this defeat
to conclude peace on the terms which the victor proposed, were obliged
to renounce the hegemony, and to consent with their whole adherents
to become clients of the Sequani; they had to bind themselves
to pay tribute to the Sequani or rather to Ariovistus, and to furnish
the children of their principal nobles as hostages; and lastly
they had to swear that they would never demand back these hostages
nor invoke the intervention of the Romans.
Inaction of the Romans
This peace was concluded apparently about 693.(29) Honour
and advantage enjoined the Romans to come forward in opposition to it;
the noble Haeduan Divitiacus, the head of the Roman party in his clan,
and for that reason now banished by his countrymen, went in person
to Rome to solicit their intervention. A still more serious
warning was the insurrection of the Allobroges in 693(30)--
the neighbours of the Sequani--which was beyond doubt connected
with these events. In reality orders were issued to the Gallic
governors to assist the Haedui; they talked of sending consuls
and consular armies over the Alps; but the senate, to whose decision
these affairs primarily fell, at length here also crowned great
words with little deeds. The insurrection of the Allobroges
was suppressed by arms, but nothing was done for the Haedui;
on the contrary, Ariovistus was even enrolled in 695 in the list
of kings friendly with the Romans.(31)
Foundation of a German Empire in Gaul
The German warrior-prince naturally took this as a renunciation
by the Romans of the Celtic land which they had not occupied;
he accordingly took up his abode there, and began to establish
a German principality on Gallic soil. It was his intention that
the numerous bands which he had brought with him, and the still
more numerous bands that afterwards followed at his call from home--
it was reckoned that up to 696 some 120,000 Germans had crossed
the Rhine--this whole mighty immigration of the German nation,
which poured through the once opened sluices like a stream over
the beautiful west, should become settled there and form a basis
on which he might build his dominion over Gaul. The extent
of the German settlements which he called into existence
on the left bank of the Rhine cannot be determined; beyond doubt
it was great, and his projects were far greater still. The Celts
were treated by him as a wholly subjugated nation, and no distinction
was made between the several cantons. Even the Sequani, as whose hired
commander-in-chief he had crossed the Rhine, were obliged, as if they
were vanquished enemies, to cede to him for his people a third
of their territory--presumably upper Alsace afterwards inhabited
by the Triboci--where Ariovistus permanently settled with his followers;
nay, as if this were not enough, a second third was afterwards
demanded of them for the Harudes who arrived subsequently.
Ariovistus seemed as if he wished to take up in Gaul the part
of Philip of Macedonia, and to play the master over the Celts
who were friendly to the Germans no less than over those
who adhered to the Romans.
The Germans on the Lower Rhine
The Germans on the Upper Rhine
Spread of the Helvetian Invasion to the Interior of Gaul
The appearance of the energetic German prince in so dangerous
proximity, which could not but in itself excite the most serious
apprehension in the Romans, appeared still more threatening,
inasmuch as it stood by no means alone. The Usipetes and Tencteri
settled on the right bank of the Rhine, weary of the incessant
devastation of their territory by the overbearing Suebian tribes,
had, the year before Caesar arrived in Gaul (695), set out
from their previous abodes to seek others at the mouth of the Rhine.
They had already taken away from the Menapii there the portion
of their territory situated on the right bank, and it might be
foreseen that they would make the attempt to establish themselves
also on the left. Suebian bands, moreover, assembled between
Cologne and Mayence, and threatened to appear as uninvited guests
in the opposite Celtic canton of the Treveri. Lastly,
the territory of the most easterly clan of the Celts, the warlike
and numerous Helvetii, was visited with growing frequency
by the Germans, so that the Helvetii, who perhaps even apart from this
were suffering from over-population through the reflux of their
settlers from the territory which they had lost to the north
of the Rhine, and besides were liable to be completely isolated
from their kinsmen by the settlement of Ariovistus in the territory
of the Sequani, conceived the desperate resolution of voluntarily
evacuating the territory hitherto in their possession to the Germans,
and acquiring larger and more fertile abodes to the west
of the Jura, along with, if possible, the hegemony in the interior
of Gaul--a plan which some of their districts had already formed
and attempted to execute during the Cimbrian invasion.(32)
the Rauraci whose territory (Basle and southern Alsace) was similarly
threatened, the remains, moreover, of the Boii who had already
at an earlier period been compelled by the Germans to forsake their
homes and were now unsettled wanderers, and other smaller tribes,
made common cause with the Helvetii. As early as 693 their flying
parties came over the Jura and even as far as the Roman province;
their departure itself could not be much longer delayed; inevitably
German settlers would then advance into the important region
between the lakes of Constance and Geneva forsaken by its defenders.
From the sources of the Rhine to the Atlantic Ocean the German tribes
were in motion; the whole line of the Rhine was threatened by them;
it was a moment like that when the Alamanni and the Franks
threw themselves on the falling empire of the Caesars;
and even now there seemed on the eve of being carried into effect
against the Celts that very movement which was successful
five hundred years afterwards against the Romans.
Caesar Proceeds to Gaul
Caesar's Army
Under these circumstances the new governor Gaius Caesar arrived
in the spring of 696 in Narbonese Gaul, which had been added by decree
of the senate to his original province embracing Cisalpine Gaul
along with Istria and Dalmatia. His office, which was committed
to him first for five years (to the end of 700), then in 699
for five more (to the end of 705), gave him the right to nominate
ten lieutenants of propraetorian rank, and (at least according to
his own interpretation) to fill up his legions, or even to form
new ones at his discretion out of the burgess-population--who were
especially numerous in Cisalpine Gaul--of the territory under his
sway. The army, which he received in the two provinces, consisted,
as regards infantry of the line, of four legions trained and inured
to war, the seventh, eighth, ninth, and tenth, or at the utmost
24,000 men, to which fell to be added, as usual, the contingents
of the subjects. The cavalry and light-armed troops, moreover,
were represented by horsemen from Spain, and by Numidian, Cretan,
and Balearic archers and slingers. The staff of Caesar--the elite
of the democracy of the capital--contained, along with not a few
useless young men of rank, some able officers, such as Publius
Crassus the younger son of the old political ally of Caesar,
and Titus Labienus, who followed the chief of the democracy
as a faithful adjutant from the Forum to the battle-field.
Caesar had not received definite instructions; to one
who was discerning and courageous these were implied
in the circumstances with which he had to deal. Here too
the negligence of the senate had to be retrieved, and first of all
the stream of migration of the German peoples had to be checked.
Repulse of the Helvetii
Just at this time the Helvetic invasion, which was closely
interwoven with the German and had been in preparation for years,
began. That they might not make a grant of their abandoned huts
to the Germans and might render their own return impossible,
the Helvetii had burnt their towns and villages; and their long
trains of waggons, laden with women, children, and the best part
of their moveables, arrived from all sides at the Leman lake near
Genava (Geneva), where they and their comrades had fixed their
rendezvous for the 28th of March(33) of this year. According
to their own reckoning the whole body consisted of 368,000 persons,
of whom about a fourth part were able to bear arms. As the mountain
chain of the Jura, stretching from the Rhine to the Rhone, almost
completely closed in the Helvetic country towards the west,
and its narrow defiles were as ill adapted for the passage
of such a caravan as they were well adapted for defence, the leaders
had resolved to go round in a southerly direction, and to open up
for themselves a way to the west at the point, where the Rhone
has broken through the mountain-chain between the south-western
and highest part of the Jura and the Savoy mountains, near
the modern Fort de l'Ecluse. But on the right bank here the rocks
and precipices come so close to the river that there remained only
a narrow path which could easily be blocked up, and the Sequani,
to whom this bank belonged, could with ease intercept the route
of the Helvetii. They preferred therefore to pass over, above the point
where the Rhone breaks through, to the left Allobrogian bank,
with the view of regaining the right bank further down the stream
where the Rhone enters the plain, and then marching on towards
the level west of Gaul; there the fertile canton of the Santones
(Saintonge, the valley of the Charente) on the Atlantic Ocean
was selected by the wanderers for their new abode. This march led,
where it touched the left bank of the Rhone, through Roman territory;
and Caesar, otherwise not disposed to acquiesce in the establishment
of the Helvetii in western Gaul, was firmly resolved not to permit
their passage. But of his four legions three were stationed far
off at Aquileia; although he called out in haste the militia
of the Transalpine province, it seemed scarcely possible with so small
a force to hinder the innumerable Celtic host from crossing
the Rhone, between its exit from the Leman lake at Geneva
and the point of its breaking through the mountains, over a distance
of more than fourteen miles. Caesar, however, by negotiations
with the Helvetii, who would gladly have effected by peaceable means
the crossing of the river and the march through the Allobrogian
territory, gained a respite of fifteen days, which was employed
in breaking down the bridge over the Rhone at Genava, and barring
the southern bank of the Rhone against the enemy by an entrenchment
nearly nineteen miles long: it was the first application
of the system--afterwards carried out on so immense a scale
by the Romans--of guarding the frontier of the empire in a military point
of view by a chain of forts placed in connection with each other
by ramparts and ditches. The attempts of the Helvetii to gain
the other bank at different places in boats or by means of fords
were successfully frustrated by the Romans in these lines,
and the Helvetii were compelled to desist from the passage of the Rhone.
The Helvetii Move towards Gaul
On the other hand, the party in Gaul hostile to the Romans,
which hoped to obtain a powerful reinforcement in the Helvetii,
more especially the Haeduan Dumnorix brother of Divitiacus,
and at the head of the national party in his canton as the latter
wasat the head of the Romans, procured for them a passage
through the passes of the Jura and the territory of the Sequani.
The Romans had no legal title to forbid this; but other and higher
interestswereat stake for them in the Helvetic expedition than
the question of the formal integrity of the Roman territory-- interests
which could only be guarded, if Caesar, instead of confining himself,
as all the governors of the senate and even Marius(34) had done,
to the modest task of watching the frontier, should cross what had hitherto
been the frontier at the head of a considerable army. Caesar was general
not of the senate, but of the state; he showed no hesitation.
He had immediately proceeded from Genava in person to Italy,
and with characteristic speed brought up the three legions
cantoned there as well as two newly-formed legions of recruits.
The Helvetian War
These troops he united with the corps stationed at Genava,
and crossed the Rhone with his whole force. His unexpected appearance
in the territory of the Haedui naturally at once restored the Roman
party there to power, which was not unimportant as regarded
supplies. He found the Helvetii employed in crossing the Saone,
and moving from the territory of the Sequani into that
of the Haedui; those of them that were still on the left bank
of the Saone, especially the corps of the Tigorini, were caught
and destroyed by the Romans rapidly advancing. The bulk
of the expedition, however, had already crossed to the right bank
of the river; Caesar followed them and in twenty-four hours effected
the passage, which the unwieldy host of the Helvetii had not been able
to accomplish in twenty days. The Helvetii, prevented by this passage
of the river on the part of the Roman army from continuing
their march westward, turned in a northerly direction, doubtless
under the supposition that Caesar would not venture to follow them
far into the interior of Gaul, and with the intention, if he should
desist from following them, of turning again toward their proper
destination. For fifteen days the Roman army marched behind
that of the enemy at a distance of about four miles, clinging
to its rear, and hoping for an advantageous opportunity of assailing
the Helvetic host under conditions favourable to victory,
and destroying it. But this moment came not: unwieldy as was the march
of the Helvetic caravan, the leaders knew how to guard against
a surprise, and appeared to be copiously provided with supplies
as well as most accurately informed by their spies of every event
in the Roman camp. On the other hand the Romans began to suffer
from want of necessaries, especially when the Helvetii removed
from the Saone and the means of river-transport ceased. The non-arrival
of the supplies promised by the Haedui, from which this embarrassment
primarily arose, excited the more suspicion, as both armies
were still moving about in their territory. Moreover the considerable
Roman cavalry, numbering almost 4000 horse, proved utterly
untrustworthy--which doubtless admitted of explanation,
for they consisted almost wholly of Celtic horsemen, especially
of the mounted retainers of the Haedui, under the command of Dumnorix
the well-known enemy of the Romans, and Caesar himself had taken
them over still more as hostages than as soldiers. There was good
reason to believe that a defeat which they suffered at the hands
of the far weaker Helvetic cavalry was occasioned by themselves,
and that the enemy was informed by them of all occurrences
in the Roman camp. The position of Caesar grew critical; it was
becoming disagreeably evident, how much the Celtic patriot party
could effect even with the Haedui in spite of their official
alliance with Rome, and of the distinctive interests of this canton
inclining it towards the Romans; what was to be the issue, if they
ventured deeper and deeper into a country full of excitement,
and if they removed daily farther from their means of communication?
The armies were just marching past Bibracte (Autun), the capital
of the Haedui, at a moderate distance; Caesar resolved to seize
this important place by force before he continued his march
into the interior; and it is very possible, that he intended to desist
altogether from farther pursuit and to establish himself
in Bibracte. But when he ceased from the pursuit and turned
against Bibracte, the Helvetii thought that the Romans were making
preparations for flight, and now attacked in their turn.
Battle at Bibracte
Caesar desired nothing better. The two armies posted themselves
on two parallel chains of hills; the Celts began the engagement,
broke up the Roman cavalry which had advanced into the plain,
and rushed on against the Roman legions posted on the slope of the hill,
but were there obliged to give way before Caesar's veterans.
When the Romans thereupon, following up their advantage, descended
in their turn to the plain, the Celts again advanced against them,
and a reserved Celtic corps took them at the same time in flank.
The reserve of the Roman attacking column was pushed forward
against the latter; it forced it away from the main body towards
the baggage and the barricade of waggons, where it was destroyed.
The bulk of the Helvetic host was at length brought to give way,
and compelled to beat a retreat in an easterly direction--the opposite
of that towards which their expedition led them. This day had
frustrated the scheme of the Helvetii to establish for themselves
new settlements on the Atlantic Ocean, and handed them over
to the pleasure of the victor; but it had been a hot day also
for the conquerors. Caesar, who had reason for not altogether trusting
his staff of officers, had at the very outset sent away
all the officers' horses, so as to make the necessity of holding
their ground thoroughly clear to his troops; in fact the battle,
had the Romans lost it, would have probably brought about
the annihilation of the Roman army. The Roman troops
were too much exhausted to pursue the conquered with vigour;
but in consequence of the proclamation of Caesar that he would
treat all who should support the Helvetii as like the Helvetii
themselves enemies of the Romans, all support was refused
to the beaten army whithersoever it went-- in the first instance,
in the canton of the Lingones (about Langres)--and, deprived
of all supplies and of their baggage and burdened by the mass
of camp-followers incapable of fighting, they were under the necessity
of submitting to the Roman general.
The Helvetii Sent back to Their Original Abode
The lot of the vanquished was a comparatively mild one.
The Haedui were directed to concede settlements in their territory
to the homeless Boii; and this settlement of the conquered foe
in the midst of the most powerful Celtic cantons rendered almost
the services of a Roman colony. The survivors of the Helvetii
and Rauraci, something more than a third of the men that had marched
forth, were naturally sent back to their former territory.
It was incorporated with the Roman province, but the inhabitants
were admitted to alliance with Rome under favourable conditions,
in order to defend, under Roman supremacy, the frontier along
the upper Rhine against the Germans. Only the south-western point
of the Helvetic canton was directly taken into the possession
of the Romans, and there subsequently, on the charming shore
of the Leman lake, the old Celtic town Noviodunum (now Nyon)
was converted into a Roman frontier-fortress,
the "Julian equestrian colony."(35)
Caesar and Ariovistus
Negotiations
Thus the threatening invasion of the Germans on the upper Rhine
was obviated, and, at the same time, the party hostile to the Romans
among the Celts was humbled. On the middle Rhine also,
where the Germans had already crossed years ago, and where the power
of Ariovistus which vied with that of Rome in Gaul was daily
spreading, there was need of similar action, and the occasion
for a rupture was easily found. In comparison with the yoke threatened
or already imposed on them by Ariovistus, the Roman supremacy probably
now appeared to the greater part of the Celts in this quarter
the lesser evil; the minority, who retained their hatred
of the Romans, had at least to keep silence. A diet of the Celtic
tribes of central Gaul, held under Roman influence, requested
the Roman general in name of the Celtic nation for aid against
the Germans. Caesar consented. At his suggestion the Haedui stopped
the payment of the tribute stipulated to be paid to Ariovistus,
and demanded back the hostages furnished; and when Ariovistus
on account of this breach of treaty attacked the clients of Rome,
Caesar took occasion thereby to enter into direct negotiation
with him and specially to demand, in addition to the return
of the hostages and a promise to keep peace with the Haedui,
that Ariovistus should bind himself to allure no more Germans
over the Rhine. The German general replied to the Roman, in the full
consciousness of equality of rights, that northern Gaul had become
subject to him by right of war as fairly as southern Gaul
to the Romans; and that, as he did not hinder the Romans from taking
tribute from the Allobroges, so they should not prevent him
from taxing his subjects. In later secret overtures it appeared
that the prince was well aware of the circumstances of the Romans;
he mentioned the invitations which had been addressed to him from Rome
to put Caesar out of the way, and offered, if Caesar would leave
to him northern Gaul, to assist him in turn to obtain the sovereignty
of Italy--as the party-quarrels of the Celtic nation had opened up
an entrance for him into Gaul, he seemed to expect from the party-
quarrels of the Italian nation the consolidation of his rule there.
For centuries no such language of power completely on a footing
of equality and bluntly and carelessly expressing its independence had
been held in presence of the Romans, as was now heard from the king
of the German host; he summarily refused to come, when the Roman
general suggested that he should appear personally before him
according to the usual practice with client-princes.