Book VI

Caesar requests Pompey to release soldiers previously levied in Cisalpine Gaul to reinforce his army, emphasizing that Rome's military capacity will demonstrate Roman discipline and power to the Gauls.

After Indutiomarus's death, the Treviri's relatives extend German support through promises and mutual oaths, forming dangerous coalitions that prompt Caesar to act preemptively.

Caesar mobilizes four legions before winter ends and launches a surprise attack on the Nervii, capturing livestock and people, forcing their surrender and providing hostages.

Caesar moves the Gallic assembly from the planned location to Lutetia to distinguish loyal states from rebellious ones, then marches immediately on the Senones.

When the Senones begin assembling in towns, news of Caesar's approach forces them to seek mercy through the Aedui, which Caesar grants while imposing one hundred hostages.

Caesar divides forces and bridges swamps to campaign against the Menapii, capturing their livestock and settlements, securing their promise to exclude Ambiorix from their territory.

Labienus feigns retreat across a river to lure the Treviri into attacking from a disadvantaged position, then turns to rout them decisively and gains control of their territory.

Caesar constructs a bridge across the Rhine to prevent German support for the Treviri and to cut off Ambiorix's escape routes, leaving a garrison and investigating German movements.

The Ubii inform Caesar that the Suevi have gathered their forces and retreated to the Bacenis Forest, which serves as a natural barrier between Germanic tribes.

Caesar announces that he will now describe Gallic and Germanic customs and manners, justifying this as relevant to understanding the military situation.

Caesar explains that Gallic society is organized into competing factions at every level, with leaders who protect their followers' interests.

Caesar traces how the Sequani, weaker initially, allied with Germans under Ariovistus to defeat the Aedui, but Caesar's arrival reversed the balance in the Aedui's favor.

Caesar describes Gallic society as divided into two orders of rank—Druids and knights—with common people held in virtual slavery.

Druids settle all public and private disputes, determine punishments and rewards, and their excommunication is the heaviest punishment among Gauls.

Druids train students orally for up to twenty years, withholding doctrine from writing, and teach that souls are immortal and transmigrate to other bodies after death.

The knight class engages in warfare and maintains followings of vassals and dependents, deriving all power and influence from these retinues.

Gauls perform human sacrifice during illness and war, preferring criminals but accepting innocents when criminals are unavailable, and construct large wicker figures filled with people to burn.

Gauls particularly honor Mercury as god of commerce and journeys, followed by Apollo, Mars, Jupiter, and Minerva, with specific battlefield customs of vowing and collecting spoils.

Gauls claim descent from the god Dis and reckon seasons by nights rather than days, with children not approaching fathers publicly until grown.

Gallic husbands add to their wives' dowries and control all property jointly; they hold life-and-death authority over wives and children, with wives subject to torture and death if paternal death is suspicious.

Wiser Gallic states prohibit citizens from spreading rumors and require reporting to magistrates only, who control public disclosure to prevent panic and rash action.

Germans worship only tangible deities—sun, fire, and moon—and have no Druids or formal sacrifices, distinguishing them sharply from Gallic religious complexity.

Germans emphasize hunting and warfare from childhood, prize chastity until age twenty, bathe communally with minimal clothing, and view these practices as strengthening physical prowess.

Germans practice annual land redistribution to prevent attachment to property, wealth accumulation, and permanent settlements, maintaining equality and martial focus.

Germans consider depopulating frontier territories the highest glory, appointing war magistrates with absolute authority while maintaining chieftain leadership in peace.

Germans regard harming guests as impious and freely provide shelter and sustenance to all visitors, treating them as inviolable.

Caesar notes that Gauls once excelled Germans militarily; the Volcae Tectosages settled in fertile German territories near the Hercynian Forest, now maintaining German customs but retaining some Gallic refinements.

Caesar describes the Hercynian Forest as a vast woodland requiring nine days to traverse, extending from the Rhine to the Danube territories, with unknown extremities.

Caesar describes an ox-shaped creature with a single horn from the forehead that branches like palm fronds, with identical appearance in males and females.

Caesar describes elk-like animals resembling roe-deer but larger, hornless, with rigid legs that prevent them from lying down or rising if fallen.

Caesar describes the uri as massive, bull-shaped creatures of extraordinary strength and speed that Germans hunt at great effort; successful hunters gain prestige by displaying horns bound with silver.

Learning that the Suevi have retreated into forests and that Germans lack agriculture, Caesar decides not to advance further but fortifies the Rhine crossing to prevent their return.

Caesar sends cavalry ahead under Basilus to pursue Ambiorix rapidly; Basilus surprises Ambiorix unguarded and seizes his equipment, but fortune allows Ambiorix to escape through his house's wooded surroundings.

Ambiorix orders his people to scatter into forests, marshes, and islands; Cativolcus, his co-conspirator, unable to endure hardship and cursing Ambiorix, poisons himself with yew juice.

These Germanic tribes claim independence from Ambiorix's cause and promise to return any Eburone refugees; Caesar accepts their allegiance and distributes his forces accordingly.

Caesar sends Labienus toward the ocean against the Menapii, Trebonius to devastate Aduatuci lands, and leads a third force personally toward Arduenna Forest after Ambiorix.

Caesar recognizes that dispersed Eburone populations hiding in valleys and marshes require careful pursuit to avoid ambush; he balances tactical caution with completing the campaign.

Caesar incentivizes neighboring Gallic states to plunder Eburone territory, redirecting Gallic warriors to hazard their lives instead of Roman legionaries.

The Sigambri, crossing the Rhine with two thousand cavalry, learn from prisoners of the Roman baggage camp and attack Aduatuka, nearly overwhelming the undermanned garrison.

Doubting Caesar's return date and responding to criticism of confinement, Cicero sends five cohorts and invalided soldiers out to forage despite the danger.

The Sigambri cavalry appear unexpectedly and attack the Decuman gate while defenders are unprepared; panic spreads as soldiers reference the earlier Titurius disaster.

The invalid centurion Sextius, weak from hunger, nonetheless seizes arms and holds the gate against attackers, inspiring others to man the fortifications.

Hearing the assault, the foraging party returns to find the camp under attack; the veteran soldiers under Trebonius break through enemy lines to reach safety.

Realizing they cannot storm the fortified camp, the Sigambri withdraw across the Rhine with their gathered plunder, leaving the garrison in prolonged alarm.

Upon return, Caesar criticizes the decision to send foragers from the garrison but credits fortune with the timely arrival of German cavalry and their eventual retreat.

Caesar organizes numerous auxiliary forces to burn villages and drive off livestock, destroying provisions so that any remaining Eburones will perish from want.

Despite constant cavalry hunts and reports of sightings, Ambiorix evades capture through hiding in forests and traveling only with four horsemen.

After devastating Eburone lands, Caesar investigates and severely punishes Acco, establishes winter quarters among the Treviri, Lingones, and Senones, then departs for Italy.