Caesar's bridges across the Rhine, the first two bridges on record to cross the Rhine river, were built by Julius Caesar and his legionaries during the Gallic War in 55 BC and 53 BC. Strategically successful, they are also considered masterpieces of military engineering. [1]
During Caesar's conquest of Gaul it became necessary to secure the eastern border of the new provinces against plundering Germanic tribes. The tribes felt safe on the eastern side of the Rhine, trusting the river as a natural border which protected them from retaliation after their opportunistic raids into the province. Caesar decided to confront them and show support for the Ubians, an allied German tribe across the Rhine.
While he could have crossed the river by boats which the Ubians had offered to provide, Caesar decided to build a bridge to demonstrate Rome's ability to bring the fight at any time to the Germanic tribes. Additionally, as he indicated in his Commentary on the Gallic War , this approach conformed more to his own dignity and style.
Caesar's first bridge was most likely built between Andernach and Neuwied, downstream from Koblenz. Book 4 (Liber IV) of his commentaries gives technical details of this wooden beam bridge. Double timber pilings were rammed into the river bottom by raising a large stone with a winch and releasing it, driving the posts into the riverbed. The most upstream and downstream pilings were slanted and secured by a beam, and multiple segments of these then linked up to form the basis of the bridge. Conflicting models have been presented based on his description. [1] [2] Separate upstream pilings guarded against flotsam and possible attacks while guard towers protected the entries. The length of the bridge has been estimated to be 140 to 400 m (roughly 460 to 1,300 ft), and its width 7 to 9 m (23 to 30 ft). The river is up to 9.1 m (30 ft) deep.
The construction of this bridge showed that Caesar, and Rome, could go anywhere, if only for a few days. Since he had over 40,000 soldiers at his disposal, they built the first bridge in only 10 days using local lumber. He crossed with his troops over to the eastern side and burned some villages but found that the Sugambri and Suebi tribes had moved eastward. The tribes had come together and were prepared to meet Caesar's army in battle, but when Caesar heard of this he quickly left the region, taking down the bridge behind him. He was only there for 18 days, and without fighting in any major battle, he returned to Gaul and cut the bridge down.
Two years later Caesar built a second bridge near the site of the first one, possibly at today's Urmitz (near Neuwied). He built the bridge "in a few days", as described in Book 6 (Liber VI). His expeditionary forces raided the countryside, but did not encounter significant opposition as the Suebi retreated. Upon Caesar's return to Gaul, the bridge was taken down.
Caesar's strategy was effective, as he was able to secure the eastern border of Gaul. He demonstrated that Roman power could easily and at will cross the Rhine and henceforth for several centuries significant Germanic incursions across the Rhine were halted. Further, his feat served him in establishing his fame at home.
With Roman colonization of the Rhine valley more permanent bridges were built later at Castra Vetera (Xanten), Colonia Claudia Ara Agrippinensium (Cologne), Confluentes (Koblenz), and Moguntiacum (Mainz).
Speculation about the location of the bridges is due to the temporary nature of the construction and the lack of a precise location in Caesar's report. However, diggings in the Andernach-Neuwied area found residual pilings that are considered to be remnants of Caesar's bridges. As an alternative site a place south of Bonn has been mentioned. [1]
The Batavi were an ancient Germanic tribe that lived around the modern Dutch Rhine delta in the area that the Romans called Batavia, from the second half of the first century BC to the third century AD. The name is also applied to several military units employed by the Romans that were originally raised among the Batavi. The tribal name, probably a derivation from batawjō, refers to the region's fertility, today known as the fruitbasket of the Netherlands.
The Helvetii, anglicized as Helvetians, were a Celtic tribe or tribal confederation occupying most of the Swiss plateau at the time of their contact with the Roman Republic in the 1st century BC. According to Julius Caesar, the Helvetians were divided into four subgroups or pagi. Of these, Caesar names only the Verbigeni and the Tigurini, while Posidonius mentions the Tigurini and the Tougeni (Τωυγενοί). They feature prominently in the Commentaries on the Gallic War, with their failed migration attempt to southwestern Gaul serving as a catalyst for Caesar's conquest of Gaul.
The Suebi or Suebians were a large group of Germanic peoples originally from the Elbe river region in what is now Germany and the Czech Republic. In the early Roman era they included many peoples with their own names such as the Marcomanni, Quadi, Hermunduri, Semnones, and Lombards. New groupings formed later, such as the Alamanni and Bavarians, and two kingdoms in the Migration Period were simply referred to as Suebian.
This article concerns the period 59 BC – 50 BC.
Year 55 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Crassus and Pompey. The denomination 55 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The Cherusci were a Germanic tribe that inhabited parts of the plains and forests of northwestern Germany in the area of the Weser River and present-day Hanover during the first centuries BC and AD. Roman sources reported they considered themselves kin with other Irmino tribes and claimed common descent from an ancestor called Mannus. During the early Roman Empire under Augustus, the Cherusci first served as allies of Rome and sent sons of their chieftains to receive Roman education and serve in the Roman army as auxiliaries. The Cherusci leader Arminius led a confederation of tribes in the ambush that destroyed three Roman legions in the Teutoburg Forest in AD 9. He was subsequently kept from further damaging Rome by disputes with the Marcomanni and reprisal attacks led by Germanicus. After rebel Cherusci killed Arminius in AD 21, infighting among the royal family led to the highly Romanized line of his brother Flavus coming to power. Following their defeat by the Chatti around AD 88, the Cherusci do not appear in further accounts of the German tribes, apparently being absorbed into the late classical groups such as the Saxons, Thuringians, Franks, Bavarians, and Allemanni.
The Gallic Wars were waged between 58 and 50 BC by the Roman general Julius Caesar against the peoples of Gaul. Gallic, Germanic, and Brittonic tribes fought to defend their homelands against an aggressive Roman campaign. The Wars culminated in the decisive Battle of Alesia in 52 BC, in which a complete Roman victory resulted in the expansion of the Roman Republic over the whole of Gaul. Though the collective Gallic armies were as strong as the Roman forces, the Gallic tribes' internal divisions eased victory for Caesar. Gallic chieftain Vercingetorix's attempt to unite the Gauls under a single banner came too late. Caesar portrayed the invasion as being a preemptive and defensive action, but historians agree that he fought the wars primarily to boost his political career and to pay off his debts. Still, Gaul was of significant military importance to the Romans. Native tribes in the region, both Gallic and Germanic, had attacked Rome several times. Conquering Gaul allowed Rome to secure the natural border of the river Rhine.
Germania, also called Magna Germania, Germania Libera, or Germanic Barbaricum to distinguish it from the Roman province of the same name, was a historical region in north-central Europe during the Roman era, which was associated by Roman authors with the Germanic people. The region stretched roughly from the Middle and Lower Rhine in the west to the Vistula in the east. It also extended at some point as far south as the Upper and Middle Danube and Pannonia, and to the known parts of southern Scandinavia in the north. Archaeologically, these people correspond roughly to the Roman Iron Age of those regions. While dominated by Germanic people, Magna Germania was also inhabited by a few other Indo-European people.
The Battle of Alesia or siege of Alesia was the climactic military engagement of the Gallic Wars, fought around the Gallic oppidum of Alesia in modern France, a major centre of the Mandubii tribe. It was fought by the Roman army of Julius Caesar against a confederation of Gallic tribes united under the leadership of Vercingetorix of the Arverni. It was the last major engagement between Gauls and Romans, and is considered one of Caesar's greatest military achievements and a classic example of siege warfare and investment; the Roman army built dual lines of fortifications—an inner wall to keep the besieged Gauls in, and an outer wall to keep the Gallic relief force out. The Battle of Alesia marked the end of Gallic independence in the modern day territory of France and Belgium.
Gallia Belgica was a province of the Roman Empire located in the north-eastern part of Roman Gaul, in what is today primarily northern France, Belgium, and Luxembourg, along with parts of the Netherlands and Germany.
The Usipetes or Usipii were an ancient tribe who moved into the area on the right bank of the lower Rhine in the first century BC, putting them in contact with Gaul and the Roman empire. They are known first from the surviving works of ancient authors such as Julius Caesar and Tacitus. They appear to have moved position several times before disappearing from the historical record.
Ariovistus was a leader of the Suebi and other allied Germanic peoples in the second quarter of the 1st century BC. He and his followers took part in a war in Gaul, assisting the Arverni and Sequani in defeating their rivals, the Aedui. They then settled in large numbers into conquered Gallic territory, in the Alsace region. They were defeated, however, in the Battle of Vosges and driven back over the Rhine in 58 BC by Julius Caesar.
The Vangiones appear first in history as an ancient Germanic tribe of unknown provenance. They threw in their lot with Ariovistus in his bid of 58 BC to invade Gaul through the Doubs river valley and lost to Julius Caesar in a battle probably near Belfort. After some Celts evacuated the region in fear of the Suebi, the Vangiones, who had made a Roman peace, were allowed to settle among the Mediomatrici in northern Alsace.. They gradually assumed control of the Celtic city of Burbetomagus, later Worms.
Roman Gaul refers to Gaul under provincial rule in the Roman Empire from the 1st century BC to the 5th century AD.
The Battle of Vosges, also referred to as the Battle of Vesontio, was fought on September 14, 58 BC between the Germanic tribe of the Suebi, under the leadership of Ariovistus, and six Roman legions under the command of Gaius Julius Caesar. This encounter is the third major battle of the Gallic Wars. Germanic tribes crossed the Rhine, seeking a home in Gaul.
The Tencteri or Tenchteri or Tenctheri were an ancient tribe, who moved into the area on the right bank of the lower Rhine in the 1st century BC. They are known first from the surviving works of ancient authors such as Julius Caesar and Tacitus. In December 2015, archaeologists believed they found remains of the Tencteri in The Netherlands.
Ambiorix's revolt was an episode during the Gallic Wars between 54 and 53 BC in which the Eburones tribe, under its leader, Ambiorix, rebelled against the Roman Republic.
The Germani cisrhenani, or "Left bank Germani", were a group of Germanic peoples who lived west of the Lower Rhine at the time of the Gallic Wars in the mid-1st century BC.
The Battle of Magetobriga was fought in 63 BC between rival tribes in Gaul. The Aedui tribe was defeated and massacred by the combined forces of their hereditary rivals, the Sequani and Arverni tribes. To secure their victory, the Sequani and Arverni enlisted the aid of the Germanic Suebi tribe led by its king Ariovistus, who would subsequently make increasingly imposing demands upon his Gallic allies. Following their defeat, the Aedui sent envoys to the Roman Senate, their traditional ally, seeking aid. The Roman general Julius Caesar would use the Aedui’s entrities and Ariovistus’ oppression as pretexts for launching his conquest of Gaul.
Germanisation is the spread of the German people, customs and institutions. The penetration of Germanic elements in the Gaul region began from the twilight of the Iron Age through migration of Germanic peoples like the Suebi and the Batavi across the Rhine into Julius Caesar's Roman Gaul. Further, one of the earliest permanent settlements of a group of Germans namely the Visigoths on Roman soil was in the post-classical period, which opened the door for various other Germanic peoples to enter Rome's Gallic provinces through the Great Rhine Crossing during the Middle Ages and spread Germanic elements further. The prevalence of various records of archeological and written evidence regarding the spread of different Germanic elements such as German burials, pottery, costumes, houses mainly between the 3rd and the 5th centuries AD in Gaul depicts the full force of the Germanisation process that took place in Gaul.
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