Hasdrubal seeks his brother
After crossing the Alps, Hasdrubal advances into Italy with reinforcements. Hannibal waits in the south, but the Roman armies of Livius and Nero separately guard the two routes.
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Battle
Metaurus
207 BC
Nero leaves his front, joins Livius, and prevents the Barcid armies from uniting
Military history
How did the movement of units give the Romans decisive local superiority at the Metaurus?
At the Metaurus, Rome first wins a battle of movement. Nero quietly leaves the southern front, joins Livius Salinator’s army in the north, and then returns before the Carthaginians understand that the balance of forces has changed.
The intercepted message
Hasdrubal’s message does not reach Hannibal. The Romans understand the threat before the two Punic armies can unite.
A discreet march
Nero detaches part of his force and joins Livius by night, minimizing visible signs of reinforcement. The battle therefore begins with a surprise concentration. Any claim of a weapons innovation lies beyond this account’s scope.
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Chronological dossier
TicinusHannibal turns a cavalry encounter into his first seizure of the initiative in Italy.TrebiaHannibal draws the Roman army towards an icy river and turns exhaustion into a tactical multiplier.Lake TrasimeneFog, hills and lake compress a Roman march into a prepared trap.CannaeHow Hannibal turns the advance of a larger army into a double envelopment.New CarthageScipio exploits intelligence, surprise and an unexpected approach to seize the principal Carthaginian base in Spain.IlipaScipio imposes several days of constraint before reversing his deployment when the Carthaginian army is least ready.ZamaScipio opens lanes for the elephants, lets allied cavalry reach the rear, then takes the Carthaginian infantry in flank.
Military history
Sources
Primary sourcePolybe, Histoires, livres III à XV
Livre XI, §§1–3
Interception of the message, Nero’s march, Roman concentration, the battle, and the failure of the junction.
View ↗Primary sourceTite-Live, Histoire romaine, livres XXI à XXX
Livre XXVII, §§47–49
Interception of the message, Nero’s march, Roman concentration, the battle, and the failure of the junction.
View ↗Specialist monographJohn F. Lazenby, Hannibal’s War: A Military History of the Second Punic War
Chapitre 13, le Métaure
Ordering the operational sequence, cautious map reconstruction, campaign constraints, and strategic significance.