Module · Military History

Hannibal's March

37 elephants. 1,600 kilometres. Over the Alps in winter. Into the heart of Rome.

218 BC
Year of the crossing
37
War elephants at departure
1
Elephant survived to Cannae
5 months
Cartagena to the Po Valley

In 218 BC, a 28-year-old Carthaginian general named Hannibal Barca assembled one of the largest armies the ancient world had ever seen — 90,000 infantry, 12,000 cavalry, and 37 war elephants — and marched them overland from Spain to Italy.

Rome controlled the sea. So Hannibal took the land. Across the Pyrenees. Through Gaul. Over the Rhône. And then, in late October, he did what the Romans believed was impossible: he took his army — elephants and all — over the Alps.

He arrived in Italy with a fraction of his force. And then he spent the next sixteen years on Roman soil, winning battle after battle, never losing a major engagement, destroying entire legions. At Cannae, he killed 50,000 Roman soldiers in a single afternoon — the worst defeat Rome would ever suffer.

He never took Rome. But he changed the course of Mediterranean civilisation. And it all started in North Africa — in Carthage, modern-day Tunisia, 150 kilometres from where the DWL ecosystem begins.

The Route

Carthage to Cannae

Carthage
Spain
Pyrenees
Gaul
Rhône
Alps
Italy
carthage1 / 16
Carthage
Tunis, Tunisia · Winter 219/218 BC

The plan is formed. Hannibal's father made him swear at age nine to be Rome's eternal enemy. Now 28, he commands the Carthaginian army in Iberia. The Senate in Carthage approves the invasion.

Army
~90,000 infantry + 12,000 cavalry
Elephants
37
The Elephants

37 to 1

The elephants were likely North African forest elephants — a now-extinct species smaller than African savannah elephants but larger than Asian elephants. Hannibal's last surviving elephant, Surus ("The Syrian"), was a one-tusked Asian elephant. He rode it with a howdah after losing an eye at Lake Trasimene.

37
alive
Departure from Cartagena

North African war elephants — likely a mix of the now-extinct North African forest elephant and possibly some Asian elephants. Trained in Carthaginian war camps.

37
alive
Through Spain & Pyrenees

All 37 survive the march through Iberia. Elephants are hardy on flat terrain and can swim rivers.

37
alive
Rhône River crossing

Elephants loaded onto enormous rafts covered with soil. Some rafts capsize. The elephants wade the rest — trunks held above water. All survive.

20
alive
Alpine crossing

17 elephants die in the Alps. Cold, ice, narrow paths, rockslides. The descent is worse than the ascent — animals slip on ice and tumble.

20
alive
Arrival in Po Valley

20 elephants reach Italy. Exhausted, starving, but alive. They will fight at Trebia.

15
alive
After Trebia

Five more die during the winter and battle. The surviving elephants are used to cross the Arno marshes.

5
alive
After Lake Trasimene

Most remaining elephants die crossing the Arno marshes. Disease, exhaustion, mud.

1
alive
Battle of Cannae

Only Surus remains. A one-tusked Asian elephant — "The Syrian." Hannibal rides him with a howdah and a red cloth. The last of 37.

Surus (the last)37 at departure
Attrition

90,000 to 26,000 — then rebuilt

025k50k75k100kCartagenaPyreneesRhôneAlps summitPo ValleyAfter Gauls joinCannae
Four Battles

Ticinus. Trebia. Trasimene. Cannae.

TicinusNovember 218 BC

First engagement. Numidian cavalry superiority established. Scipio wounded. Gallic tribes switch to Hannibal.

Roman losses
~2,000
Carthaginian losses
Minimal
Elephants present
20
Location
Near Pavia
TrebiaDecember 218 BC

Classic ambush. Romans lured across freezing river. Elephants used on the flanks to panic Roman cavalry.

Roman losses
~20,000 killed
Carthaginian losses
~5,000
Elephants present
15
Location
Near Piacenza
Lake TrasimeneJune 217 BC

Largest ambush in military history. Fog, lake, hills — perfect trap. Hannibal loses eye to infection afterward.

Roman losses
~15,000 killed, 10,000 captured
Carthaginian losses
~1,500
Elephants present
5
Location
Umbria
CannaeAugust 216 BC

The double-envelopment. The worst defeat in Roman history. Still studied in military academies worldwide. Only one elephant remains: Surus.

Roman losses
~50,000–70,000 killed
Carthaginian losses
~6,000
Elephants present
1
Location
Puglia
264 BC – 146 BC

From the oath to the ashes

264–241 BC
politics
First Punic War

Rome defeats Carthage. Carthage loses Sicily, Corsica, and Sardinia. Forced to pay massive war indemnities. Hamilcar Barca swears revenge.

237 BC
politics
Hamilcar takes 9-year-old Hannibal to Spain

Hannibal's father makes him swear over flames: "I will use fire and steel to arrest the destiny of Rome." The boy will keep this oath for the rest of his life.

221 BC
politics
Hannibal takes command

At 26, Hannibal becomes commander of Carthaginian forces in Spain after his father and brother-in-law are killed.

219 BC
politics
Siege of Saguntum

Hannibal besieges and takes Saguntum, a Roman ally in Spain. Rome declares war. The Second Punic War begins.

Spring 218 BC
march
The march begins

Hannibal departs Cartagena with ~90,000 infantry, 12,000 cavalry, and 37 war elephants. Destination: Rome. Route: overland through Spain, France, and over the Alps.

Summer 218 BC
march
Crossing the Pyrenees

11,000 Iberian troops released. 20,000 left as garrison. The army is deliberately reduced to committed fighters.

September 218 BC
march
Crossing the Rhône

Elephants rafted across. Some rafts capsize. Elephants wade with trunks above water. All 37 survive. Roman army at Marseille misses the interception.

October 218 BC
march
Crossing the Alps

16 days. Snow, ice, hostile tribes, rockslides. Fires lit against cliff faces, vinegar poured on heated rock to crack it. 17 elephants die. Army loses over half its men.

November 218 BC
battle
Battle of Ticinus

First battle in Italy. Numidian cavalry defeats Scipio. Minor victory but Gallic tribes defect to Hannibal, rebuilding his army.

December 218 BC
battle
Battle of Trebia

Romans lured across freezing river at dawn. Ambushed on both flanks. Elephants used to charge cavalry. ~20,000 Romans killed.

June 217 BC
battle
Battle of Lake Trasimene

Largest ambush in military history. Hannibal hides army in fog, traps Romans against the lake. ~15,000 killed, 10,000 captured.

August 216 BC
battle
Battle of Cannae

The masterpiece. Double-envelopment destroys a Roman army of 86,000. At least 50,000 killed in one day. The worst defeat in Roman history. Only Surus, one elephant, remains.

216–203 BC
aftermath
13 years in Italy

Hannibal occupies southern Italy for 13 years. Never has resources to attack Rome directly. Carthage fails to reinforce him — possibly due to political rivalry at home.

207 BC
aftermath
Hasdrubal's head

Hannibal's brother Hasdrubal crosses the Alps with reinforcements but is defeated at Metaurus. Romans throw his severed head into Hannibal's camp. "There lies the fate of Carthage."

202 BC
aftermath
Battle of Zama

Hannibal recalled to defend Carthage. Scipio Africanus defeats him in Tunisia. Carthage sues for peace. The Second Punic War ends.

146 BC
aftermath
Carthage destroyed

Rome razes Carthage to the ground in the Third Punic War. The city is burned for 17 days. The civilisation that produced Hannibal ceases to exist.

The Connection

Carthage is 150 km from the DWL ecosystem

Hannibal was born in Carthage — modern-day Tunis, Tunisia. The ruins of Carthage sit on the Mediterranean coast, a short flight from Marrakech. Tunisia is in the Slow World pipeline. This is not ancient history happening somewhere else. This is the neighbourhood.

The war elephants were North African forest elephants — the same species that once roamed the Atlas Mountains, now extinct. The Barbary lion that DWL is named for lived in the same forests. North Africa was once teeming with megafauna that shaped Mediterranean civilisation — and then vanished.

Hannibal's march is the greatest logistics story ever told. A man from North Africa — from this part of the world — assembled the largest army of his era and walked it into the heart of the world's most powerful empire. He did it overland because the sea was denied to him. He did it with elephants because psychological warfare is older than gunpowder. And he nearly won.

Sources

Polybius. The Histories, Book III (c. 150 BC). Primary source.

Livy. Ab Urbe Condita, Book XXI (c. 27–25 BC). Primary source.

Mahaney, W.C. et al. (2016). Biostratigraphic evidence relating to the age-old question of Hannibal's invasion of Italy. Archaeometry 58(1): 164–178.

Lendering, Jona. Hannibal in the Alps (2022). Review of primary sources.

de Beer, Gavin. Hannibal: The Struggle for Power in the Mediterranean (1969).

Hunt, Patrick. Alpine Archaeology (Stanford University). Col de la Traversette research.

PBS Secrets of the Dead: Hannibal in the Alps (2018). Documentary.

Goldsworthy, Adrian. The Fall of Carthage (2000). Cassell Military.

Sources: Polybius, Livy, Britannica, Stanford Alpine Archaeology, PBS Secrets of the Dead

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