Book VII

Caesar leaves for Italy after Clodius's death and senate decree on military recruitment. Rumors spread through Transalpine Gaul that Caesar is detained by Roman civil unrest and cannot reach his army, emboldening the Gauls who were already discontented with Roman rule.

The Carnutes declare they will initiate the war and demand solemn oaths from other Gallic states that they will not abandon them once hostilities begin, binding themselves through their sacred military standards.

The Carnutes under Cotuatus and Conetodunus massacre Roman citizens at Genabum, including the knight Caius Fusius Cita, and plunder their property. This act spreads rapidly through Gaul by the Gallic relay-shout system, reaching Arverni territory in a single night.

Vercingetorix, a young Arvernian of high rank, is initially expelled by nobles for proposing an uprising but gathers desperate men, converts fellow citizens to his cause, and gains overwhelming support through the force of his personality and strategic vision. He consolidates power through severity and becomes king.

Vercingetorix sends ambassadors throughout Gaul, gains the support of many tribes, and receives supreme command by unanimous consent. He demands hostages, sets military quotas, and enforces discipline through severe punishments for transgressions.

Vercingetorix sends Lucterius to the Ruteni territory and marches personally against the Bituriges. The Aedui hesitate to aid the Bituriges due to alleged Biturigian treachery, causing that state to join the Arverni instead.

Caesar receives news of the Gallic uprising while in Italy and immediately travels to Transalpine Gaul. He recognizes the strategic danger of summoning legions piecemeal or traveling to his army unguarded, so he must find another way to reach his forces safely.

Lucterius advances toward the Roman province threatening Narbo. Caesar prioritizes defending the province, establishes garrisons among allied tribes, and positions forces to intercept the Gallic threat.

Despite severe snow, Caesar clears a path through Mount Cevennes and reaches Arverni territory, surprising the enemy who considered the mountain an impassable defense. He deploys cavalry to spread panic.

Caesar leaves a decoy army under Brutus while secretly traveling to Vienna and then rapidly marching to reunite with his legions in Lingones territory, surprising Vercingetorix and preventing any coordinated Gallic attack on a divided Roman force.

Vercingetorix moves to besiege Gergovia, a Roman-allied town. Caesar faces a dilemma: staying in winter quarters risks losing all Gallic allies, but marching risks supply problems and military hazard.

Caesar rapidly invests Vellaunodunum to prevent enemies in his rear and secure provisions. After two days of circumvallation, the town surrenders, yielding arms, cattle, and hostages.

Caesar reaches Genabum in two days and captures it despite a nighttime escape attempt, burning the town and massacring the inhabitants as revenge for the earlier Roman slaughter.

The town of Noviodunum appears to surrender but revolts when Gallic cavalry is spotted nearby. Roman centurions seize the gates and recover Roman personnel before the townspeople can rearm, and Caesar wins a cavalry engagement.

After three defeats, Vercingetorix assembles his council and proposes a new strategy: avoid pitched battles, use cavalry to prevent Roman foraging, and burn the countryside to starve the enemy. The Gauls accept this attrition-based approach.

The Gallic council debates whether to burn Avaricum or defend it. The Bituriges plead to defend their greatest city, arguing its natural defenses make it tenable. The council grants permission against Vercingetorix's initial objection.

Caesar camps at the only accessible side of Avaricum and begins siege works despite extreme supply shortages from burned countryside and reluctant allies. His soldiers endure hunger but remain loyal.

The Gauls employ sophisticated counter-siege tactics: defensive hooks to catch Roman siege equipment, mining operations, tall towers, nighttime sorties, and fire. Their wall construction uses alternating beams and stones to resist both fire and battering rams.

After 25 days, Caesar's siege mound nearly touches the walls but catches fire from a Gallic mine. A heroic Gallic defender continuously passes flaming materials despite being struck down repeatedly by Romans, until the fire is extinguished.

The Gauls plan a nighttime escape, but the town's women rush into streets begging their men not to abandon them, then loudly alert Romans. Fear of losing the escape route causes the Gauls to abandon the plan.

Caesar observes negligent guard during a storm and launches a surprise assault. Roman soldiers scale the walls before defenders can effectively respond, leading to a rout and massacre of approximately 40,000 inhabitants.

After the catastrophic loss at Avaricum, Vercingetorix gives a speech explaining the defeat as due to Roman assault tactics rather than Gallic cowardice, promising to compensate through diplomatic unification of all Gaul, and proposing they fortify their camp.

Rather than losing credibility from the Avaricum disaster, Vercingetorix gains authority because he showed foresight in originally opposing the defense and courage in facing his army after defeat. The Gauls begin fortifying camps as he requested.

Vercingetorix reequips survivors with arms and clothing, levies new forces from each state, gathers all available archers, and receives reinforcements including Teutomarus with Aquitanian cavalry, quickly rebuilding his diminished forces.

Aeduan ambassadors seek Caesar's intervention in a succession dispute between two magistrates. This internal division threatens the state's stability and could lead to them joining Vercingetorix if Caesar cannot resolve it.

Caesar personally travels to the Aedui, assembles their senate, and adjudicates the dispute by invalidating the illegally-appointed magistrate and confirming the properly-elected one, preserving the alliance.

Caesar reorganizes his army, giving Labienus four legions to campaign in Senone and Parisian territories, while he leads six legions toward Gergovia. Vercingetorix responds by breaking bridges on the Allier to impede Caesar's advance.

Vercingetorix guards the Allier by breaking bridges and positioning scouts. Caesar secretly rebuilds a bridge with two legions while sending the main force ahead, then reunites his army and pursues the retreating Vercingetorix.

Caesar reaches Gergovia in five days and notes a cavalry skirmish, but recognizes the heavily fortified hilltop town as difficult to take by storm. He decides to secure supplies before attempting siege operations.

Vercingetorix camps on the mountain near town with each state's forces separate. Caesar identifies an accessible hill opposite the town that controls water and forage; he captures it at night with two legions and fortifies the position.

Convictolitanis, the magistrate Caesar just installed, and young Aeduan nobles including Litavicus accept Arvernian bribes and plan to turn the ten thousand Aeduan troops Caesar assigned to him against the Romans, exploiting anti-Roman sentiment.

Litavicus tells his troops that Caesar has executed leading Aeduans without trial and massacred their knights, using coached witnesses to support false claims. He incites them to abandon Caesar and join the Arverni for vengeance.

Eporedorix, an Aeduan of high rank whom Caesar had elevated, learns of Litavicus's plot and alerts Caesar almost at midnight, warning that thousands of Aeduan soldiers could defect and that their relatives might feel compelled to side with the enemy.

Caesar immediately draws out four light legions and all cavalry, travels 25 miles at speed, intercepts the Aeduan army, produces the supposedly-killed Aeduan nobles (Eporedorix and Viridomarus), exposes Litavicus's deception, and accepts the soldiers' submission.

While Caesar pursues the Aeduan conspiracy, Fabius reports the main camp at Gergovia is under intense attack by a powerful Gallic force with fresh relays. Caesar rushes back with his exhausted soldiers to reach the camp before sunrise.

Without waiting to verify Litavicus's claims, the Aedui plunder Roman merchants and massacre or enslave them. Convictolitanis encourages further outrages. Though ambassadors later claim ignorance and confiscate Litavicus's property, they remain compromised by shared plunder.

Caesar addresses the Aeduan ambassadors mildly to preserve the alliance, but recognizes he must extract himself from Gergovia without appearing to flee a wider Gallic coalition, so he begins planning how to concentrate his forces.

Caesar notices the hill occupied by the enemy is stripped of men and learns from deserters that the rear is lightly defended with a wooded path leading to the town's other side. He sees an opportunity for an assault.

Caesar sends cavalry to create noise after midnight, deploys baggage and disguised muleteers as cavalry at dawn, and stations one legion in hidden position. These feints convince Gauls to shift forces to defend the rear position.

Seeing the enemy camp deserted, Caesar disguises unit insignia, moves soldiers in small groups, and instructs leaders to avoid excessive advances. He orders the Aedui to attack from the right flank and gives the signal.

Roman troops rapidly overcome a six-foot stone wall in the middle of the hill and quickly overrun the Gallic camps. Teutomarus the Nitiobriges king barely escapes with his life and horse wounded.

Despite Caesar's order to retreat, many legions continue pursuing toward the town wall, inspired by apparent victory. The shout of defenders alarms the town, and matrons throw items from walls and beg mercy, but Roman soldiers reach the walls.

As Romans assault the town gates, Gallic forces from the opposite side rush to the walls. Fresh Gallic troops overwhelm the exhausted Romans; centurion Lucius Fabius and others are killed scaling the wall. Romans lose 46 centurions and must retreat.

Centurion Marcus Petreius, surrounded at the gate with his company, realizes he cannot save everyone. He charges the enemy, slays two, and dies holding the gate so his men can escape.

Roman soldiers are driven from the hill with significant losses. The tenth legion in reserve and cohorts from the smaller camp under Titus Sextius check the Gallic pursuit and allow Romans to reach the plain where they reform.

Caesar assembles his legions and harshly criticizes their disobedience, rash judgment, and greed. He contrasts their courage with their arrogance in believing they knew better than their general, and demands forbearance and self-command.

Caesar draws up his army in battle formation and offers combat, but Vercingetorix refuses to leave his fortified position. After a minor successful cavalry action, Caesar leads his army away from Gergovia with credibility preserved.

Caesar meets Eporedorix and Viridomarus and learns Litavicus has fled with cavalry. Caesar allows them to depart despite seeing signs of Aeduan treachery, choosing not to appear suspicious or insulting. He reminds them of benefits he has conferred.

Eporedorix and Viridomarus arrive at Noviodunum, learn that Litavicus controls the major Aeduan city and the magistrate supports the revolt. They seize this moment to switch sides, massacre the Roman garrison and merchants, divide treasure and horses, and burn the town.

Caesar learns of the Aeduan defection but chooses to advance rather than retreat to the province, recognizing the strategic disaster that would entail. He finds a ford through the swollen Loire despite enemy opposition and crosses safely with supplies.

Labienus leaves recruits to guard baggage and marches to Lutetia, discovering heavy Gallic resistance under the aged commander Camulogenus, who controls a marsh that makes direct assault difficult.

Labienus cannot cross the marsh directly, so he retreats, takes ships at Melodunum downriver, transports his army across the Seine, and advances toward Lutetia while the enemy burns it and moves to block him.

Caesar receives reports that Labienus faces the Bellovaci (renowned warriors), the experienced Gallic commander Camulogenus, separation from his baggage by the Seine, and Aeduan defection. Labienus decides to extract rather than advance or provoke battle.

Labienus divides his forces: five cohorts guard camp while five others march upriver loudly with boats; he deploys ships downriver. These feints convince the Gauls his army is escaping in three directions, so they split their forces.

As dawn breaks, all Roman forces have crossed. Labienus encourages his soldiers by reminding them of Caesar's past victories. The seventh legion breaks the Gallic right wing; the twelfth legion faces determined resistance but the seventh legion circles to the rear, destroying the Gallic force.

Knowledge of Aeduan defection spreads Gallic revolt further. The Aedui invite Vercingetorix to their councils and demand he retain supreme command, which an all-Gallic council confirms. Only the pro-Roman Remi and Lingones, plus remote Treviri, hold apart.

Vercingetorix demands hostages, levies cavalry and troops from all states, and commits to scorched-earth policy. He sends forces to attack Roman allies in the province and attempts to subvert the Allobroges through promises and money.

Only twenty-two cohorts under Lucius Caesar defend the entire province against multiple Gallic thrusts. The Helvii are defeated in open battle. Caesar summons cavalry and light-armed infantry from subdued Germanic tribes to bolster his mounted forces.

Vercingetorix assembles his cavalry and argues the time is ripe to attack marching Romans whose infantry must slow to help if the cavalry are pressed. The cavalry swear a sacred oath not to shelter any man who fails to ride through the enemy twice.

The Gallic cavalry attack Caesar's marching columns in three divisions. Caesar divides his cavalry to meet them, and the battles continue as the legions halt with baggage protected. The German cavalry on the right wing gains a hill and routs the left Gallic wing.

In the rout, Caesar's troops capture three leading Aeduans: Cotus (cavalry commander), Cavarillus (infantry commander), and Eporedorix, who had turned against Caesar.

With his cavalry routed, Vercingetorix leads his troops in good order to Alesia, a hilltop town of the Mandubii. Caesar pursues, kills about three thousand stragglers, and arrives at Alesia the next day prepared to besiege it.

Alesia sits atop a high hill surrounded by rivers, plains, and outer hills. The Gallic army occupies space beneath the walls with fortifications. Caesar plans an 11-mile circumvallation with 23 redoubts to besiege both the town and Vercingetorix's army.

A cavalry engagement breaks out in the three-mile plain. Caesar sends Germans to help distressed Romans and draws up legions to prevent sallies. The Gauls are routed, crowding through narrow gates and being slaughtered by pursuing Germans.

Vercingetorix decides to send all cavalry away before Roman circumvallation is complete, ordering them to recruit forces from their home states and promising to hold out for thirty days. He keeps all supplies for the trapped infantry.

Caesar digs a 20-foot trench with perpendicular sides, sets works 400 feet back, adds two more 15-foot trenches (one filled with water), raises a 12-foot rampart with parapets and turrets 80 feet apart. An outer line of 14 miles is built to face relieving forces.

Caesar constructs multiple obstacle systems: sharpened stakes (cippi) in five intersecting rows; pits with hardened stakes barely projecting (lilies); and iron hooks (spurs) planted in ground at intervals. These are designed to inflict casualties on attackers.

Caesar constructs a second line of equal strength over 14 miles to face relieving forces, ensuring that if Gallic relief arrives, the Roman garrison cannot be surrounded and can continue defending against both inside and outside threats.

The Gallic council determines to levy fixed quotas from each state rather than all available men, to ensure supplies and coherent command. They assemble approximately 240,000 infantry and 8,000 cavalry, with supreme command divided among Commius and three other generals.

The besieged Gauls miss their expected relief date and exhaust supplies. They debate whether to surrender or attempt a risky sally. Critognatus proposes cannibalism like the Cimbri, arguing it preserves honor better than slavery.

The Gallic council decides to keep only fighting men. They expel old, sick, and infirm inhabitants. The Mandubii women and children beg Romans for admission and food, but Caesar forbids it, leaving them to die in the space between fortifications.

The relief commanders arrive with their full forces and occupy the hills, camping within a mile of Roman fortifications. The besieged see their allies and take heart, preparing to support a coordinated assault.

Caesar stations his army on both fortification lines. The cavalry engages in the plain; the Gauls fight from dawn to sunset with advantage shifting several times, but Germans charge and rout the Gallic archers. The inside garrison loses heart.

The Gauls mount a nighttime assault with hurdles, ladders, and hooks. Vercingetorix signals from town and leads a simultaneous sally. But the Romans hold their assigned posts, and the obstacles inflict heavy casualties. At dawn the Gauls retreat.

After reconnoitering, the Gallic generals identify the weak northern camp under Reginus and Rebilus. They select 60,000 men under Vergasillaunus to attack at noon while cavalry and infantry demonstrate elsewhere.

As Vergasillaunus attacks the northern camp, Vercingetorix sallies from town with siege equipment and attacks on all sides. Romans are stretched thin along extensive lines and confused by distant shouts from their rear.

Caesar takes a high vantage point and observes all positions. Both sides recognize this as the decisive moment. Caesar sends Labienus with six cohorts to relieve the pressured northern camp, exhorting other sectors not to tire.

The Gauls inside make heavy progress, using engines and numbers to fill trenches and breach ramparts. Caesar sends Brutus with six cohorts, then Fabius with seven more as the struggle intensifies.

Labienus reports that ramparts and ditches cannot stop the Gallic assault. Caesar arrives in person with his distinctive red cloak and additional cohorts. His appearance rallies Roman troops; cavalry strike the Gallic rear, causing panic and rout.

The Gallic cavalry charge is broken by Romans; a general slaughter ensues in all directions. Vergasillaunus is captured alive; 74 military standards are taken. Few of the relief force escape, and the siege camp is abandoned.

Seeing the relief army destroyed and their allies fleeing, the besieged lose hope. Vercingetorix convenes a council and announces he will either die for the cause or surrender himself. Ambassadors offer him to Caesar, who demands arms and chieftains.

Caesar marches to the Aedui to secure their allegiance, demands many hostages from the Arverni, releases about 20,000 captives to reward loyal allies, distributes remaining prisoners as plunder to soldiers, and positions legions in winter quarters across Gallic territory.