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Information about Caesar's Rhine Bridges

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Likely site of Rhine crossings
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This article is part of the series on: Military of ancient Rome ()
800 BC–AD 476
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Caesar’s Rhine bridges, the first two bridges to cross the Rhine River, were built by Julius Caesar and his legionaries during the Gallic War in 55 BC and 53 BC, respectively. Strategically successful, they are also considered masterpieces of military engineering.[1]

Background

During the conquest of Gaul it became necessary to secure the eastern border of the new provinces against marauding Germanic tribes. The tribes felt safe on the eastern side of the Rhine river, trusting the river as a natural border which offered cover from retaliatory attack after their opportunistic raids into the province. Caesar decided to confront them. He also wanted to show support for the Ubii, an allied German tribe across the Rhine. While he could have crossed the Rhine by boat, he decided to build a bridge. By this he demonstrated the might and power of Rome. In addition, as he indicated in his Commentary on the Gallic War, this approach conformed more to the dignity of the Roman Army.

Construction

The first bridge

The actual construction of Caesar's first bridge took place most likely between Andernach and Neuwied, downstream of Koblenz. Liber IV of his commentaries gives technical details of this wooden beam bridge. Double timber pilings were rammed into the bottom of the river by winching up a large stone and releasing it, thereby driving the beam 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 were used as protective barriers 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, and its width 7 to 9 m. The depth of the river can reach up to 9.1 m.

The construction of this bridge showed that Julius Caesar, and Rome, could go anywhere. 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 site and burned some villages but found that the tribes of the Sugambri and Suebi had moved eastward. After 18 days and without any major battle he returned to Gaul and cut the bridge down.

The second bridge

Two years later, close to the site of the first bridge, possibly at today's Urmitz (near Neuwied), Caesar erected a second bridge, built "in a few days", as described in Liber VI. His expeditionary forces raided the country side but did not encounter significant opposition as the Suebi retreated. Upon returning to Gaul, the bridge was taken down again.

Results

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 Xanten, Cologne, Koblenz, and Mainz.

Controversies about the location

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]

References

Further reading

Military of ancient Rome (Latin: militia) relates to the combined military forces of Ancient Rome from the founding of the city of Rome in the 8th century BC to the fall of the Western Roman Empire in the 5th century AD.
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The structural history of the Roman military describes the major chronological transformations in the organisation and constitution of ancient Rome's armed forces, "the most effective and long-lived military institution known to history".
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The Roman army was a set of land-based military forces employed by the Roman Kingdom, Roman Republic and later Roman Empire as part of the Roman military. For its main infantry constituent and for much of its history, see Roman legion; for a catalogue of individual legions, dates
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This is a list of both unit types and ranks of the Roman army from the Roman Republic to the fall of the Roman Empire. The distinction between rank and unit type doesn't seem to have been as precise as in a modern-day army, in which a solider has a
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This is a list of Roman legions, including key facts about each legion. This article primarily focuses on Principate (early Empire, 30BC - 284AD) legions, for which we have substantial literary, epigraphic and archaeological evidence.
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Auxiliaries (from Latin: auxilia = supports) formed the standing non-citizen corps of the Roman army of the Principate (30 BC - 284 AD), alongside the citizen legions.
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A

Manius Acilius Glabrio -- Manius Acilius Glabrio (consul 191 BC) -- Manius Acilius Glabrio (consul 91) -- Titus Aebutius Helva -- Aegidius -- Lucius Aemilius Barbula -- Marcus Aemilius Lepidus (triumvir) --
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The Roman Navy (Latin: Classis) operated between the First Punic War and the end of the Western Roman Empire.

History

By period

Early Republic


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campaign history of the Roman military is the account of the Roman military's land battles, from its initial defence against and subsequent conquest of the city's hilltop neighbours in the Italian peninsula, to the ultimate struggle of the Western Roman Empire for its existence
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The following is a List of Roman wars fought by the ancient Roman Kingdom, Roman Republic and Roman Empire, organized by date.

4th century BC

  • First Samnite War (343-341 BC)
  • Latin War (340-338 BC)
  • Second Samnite War (326-304 BC)

3rd century BC


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The following is a list of Roman Battles fought by the Roman Kingdom, the Roman Republic, the Roman Empire, and sometimes the Byzantine Empire, organized by date. The list is not exhaustive.
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As with most other military forces the Roman military adopted a "carrot and stick" approach to military, with an extensive list of decorations for military gallantry and likewise a range of punishments for military transgressions.
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The technology history of the Roman military covers the development of and application of technologies for use in the armies and navies of Rome from the Roman Republic to the fall of the Western Roman Empire.
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Roman military engineering (Praefectus fabrum)is a type of Roman engineering carried out by the Roman Army - almost exclusively by the Roman legions for the furthering of military objectives.
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castra,[1] with its singular castrum, was used by the ancient Romans to mean any building or plot of land reserved to or constructed for use as a military defensive position.
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Roman siege engines were, for the most part, adapted from Hellenistic siege technology. Relatively little was done on their part to develop the technology, however the Romans brought an unrelentingly aggressive style to siege warfare (Goldsworthy 2000: 144).
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List of ancient Roman triumphal arches

(By modern country)

France

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Germany

  • Porta Nigra, Trier


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Roman roads were essential for the growth of the Roman empire, by enabling the Romans to move armies. A proverb says that "all roads lead to Rome." At its peak, the Roman road system spanned 52,819 miles (85,004 km) and contained about 372 links.
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Roman military personal equipment was produced in large numbers to established cows and used in an established way. These standard patterns and uses were called the res militaris or disciplina.
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Rome's military was always tightly keyed to its political system. In the Roman kingdom the social standing of a person impacted both his political and military roles. The political system was from an early date based upon competition within the ruling elite.
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The strategy of the Roman Military encompasses its grand strategy (the arrangements made by the state to implement its political goals through a selection of military goals, a process of diplomacy backed by threat of military action, and a dedication to the military of part
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Roman infantry tactics refers to the theoretical and historical deployment, formation and maneuvers of the Roman infantry from the start of the Roman Republic to the fall of the Western Roman Empire.
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Roman military borders and fortifications were part of a grand strategy of territorial defense in the Roman Empire. By the early second century, the Roman Empire had reached the peak of its territorial expansion and rather than constantly expanding their borders as earlier in the
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State Party
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Hadrian's Wall is a stone and turf fortification built by the Roman Empire across the width of modern-day England. It was the second of three such fortifications built across Great Britain, the first being Gask Ridge and the last the Antonine Wall.
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bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. Designs of bridges will vary depending on the function of the bridge and the nature of the terrain where the bridge is to be constructed.
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Origin Grisons, Switzerland

Basin countries Switzerland, Liechtenstein, Austria, Germany, France, Netherlands
Length 1,320 km (820 mi)
Source elevation Vorderrhein: approx. 2,600 m (8,500 ft)
Hinterrhein: approx. 2,500 m (8,200 ft)

Avg.
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Gaius Julius Caesar
Dictator of the Roman Republic

Reign October, 49 BC–March 15, 44 BC
Full name Gaius Julius Caesar
Born 12 July 100 BC - 102 BC
Rome, Roman Republic
Died 15 March 44 BC (aged 57)
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