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BATTLE // -57 BCE

Battle of the Arar

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Overview

The Battle of the Arar was fought between the migrating tribes of the Helvetii and six Roman legions under the command of Gaius Julius Caesar in 58 BC. It was the first major battle of the Gallic Wars and ended in a tactical victory for the outnumbered Roman army.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of the Arar was the first major engagement of the Gallic War, pitting six Roman legions under Julius Caesar against the migrating Helvetii. Despite being significantly outnumbered — Roman forces numbered approximately 30,000 against a Helvetii force of around 92,000 — the battle ended in a tactical Roman victory. As the opening major confrontation of the war, it established Roman military initiative against the migrating tribal confederation and set the operational tone for Caesar's subsequent campaigns in Gaul.

Forces & casualties

Troop strength

  • Roman Republic30,000
    medium
  • Helvetii92,000
    medium

Helvetii fielded a 3.1 : 1 numerical advantage

Commanders (2)

Helvetii

Roman Republic

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Last verified July 2026
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