Roman Assault -
The
momentum of the roman attack is slowed down by the peculiar formation.They also
have to adjust to the alternate fighting styles of the celts and iberians.One fights with a slashing long sword,the other the thrusting short sword.More roman troops enter the fight.The fresh Principes reinforce the hastati and the gauls and spaniards are slwoly and inexorably driven back(in effect straightening out the carthaginian centre).
''at first equally matched in strength and confidence, the Gauls and Spaniards stood firm for as long as their formation held. At length the Romans, surging forward again and again on an even front and in dense array drove back the
advanced wedge formed by the enemy which was too thin and weak to hold.'' -Livy
Legions to the immediate sides of the centre legions are
instinctively drawn inward towards the nearest enemy,that is the thrust out carthaginian centre.The
compression of the romans towards the centre of the line thus begins.Hannibal fights amongst the men in the centre inspiring hem and controlling the slow withdrawal under pressure.Meanwhile Hasdrubal
reforms and rallies his cavalry.He sends one contingent to keep up pursuit of the surviving roman cavalry,most of which are wiped out.
Trap is sprung -
Carthaginian crescent shape changes as roman pressure on the centre builds and more and more roman reserves are pumped in to puncture the line.At
first the convex shape is pounded flat,and then
pushed back and back into a concave shape.Hannibal and mago move around the line
shouting encouragement to resist a while longer to gain every precious second.Hannibal had turned the strength of the Roman infantry into a weakness. While the front ranks were gradually advancing, the bulk of the Roman troops began to
lose their cohesion, as they began crowding themselves into the growing gap.With the enemy line and about to collapse,the
romans sense victory and the
overcrowded roman centre and reserves surge forward,rapidly filling the salient.Finally the carthaginian centre collapses as the gauls and spaniards begin to rout under the irresistable pressure of the roman legions.Paullus, Geminus and the other officers with the infantry see that the plan was working and redoubled their efforts to pour more of their reserves into the gap, giving the enemy no opportunity to rally. In the centre of the battlefield a great mass of Roman infantrymen some tens of thousands strong pressed forward to complete the rout of the enemy foot and pursue them. In the haste of this breakthrough however,and the heavy combat before it the formed order of the roman centre had disappeared
infantry were now more like a crowd than an organized body divided into distinct sub-units closely controlled by their officers.
As the Romans taste victory ,they suddenly face the hitherto unseen
african pikemen on their exposed flanks who with excellent discipline
wheel inwards,lower their pikes in a phalanx and
crash into the overextended and disorganized mass from both sides as the romans are stunned.The
Roman momentum is evaporated and in total surprise the
advance is halted under the weight of this new attack.
Maenwhile,in accordance with Hannibal's plan Hasdrubal leads his reformed cavalry circling around the roman rear and
attacks the Allied italian cavalry engaged with the numidians in the rear.The Italian cavalry is routed.
Double Envelopment -
The whole roman line loses its momentum,as the flanks densely packed due to the deep maniples try to unsuccesfully turn and face this new menace.The routing Celts and Iberians see the Romans under attack from both sides,
Hannibal and Mago rally the survivors of the centre and the light infantry and again join the fray,thus plugging the gap in the centre
.Faced with attacks from all sides
,and so densely packed that they can't effectively wield their weapons-the legions begin to fall back.
Hasdrubal having left the pursuit of the allied cavalry to the numidians now reform and
charge into the rear of the roman army,cutting off their final escape route.Surrounded from all sides,unable to use their weapons
due to lack of space-the depth of their own formations now turned against them-the romans are slowly slaugtered throughout the day as the Carthaginians tighten the noose
.Paullus is cut down with his men.
"as their outer ranks were continually cut down, and the survivors forced to pull back and huddle together, they were finally all killed where they stood." -Polybius
The
entire roman force-Rome's greatest ever field army is annihilated.Hannibal had won an unbelievable victory.
Losses - It was the
greatest battlefield victory of all time.Hannibal had successfully executed a move thought nigh-impossible - The
double envelopment of an army superior in both numbers and quality.
The roman losses had been catastrophic.
55,000-70,000 infantry killed. 2300 cavalry dead. Further 4500 infantry and cavalry were captured shortly afterwards.
80 roman senators,29 out of 38 military trbunes and 300 noblemen were killed in the battle,including the Consul
Paullus,Minicius(same as the one from Geronium) and
Geminus,the consul of last year.Cream of Rome's political leadership was completely wiped out in a single day.
Hannibal lost
5700 killed and more wounded.4000 gauls and 1500 spanish and africans.Plus 200 cavalry.
Reasons for Roman Defeat -
1>Know Your Enemy - Hannibal knew exactly what the romans intended to do,their familiar battering ram assault being
all too predictable to him.He
turned his enemies greatest strength-the depth and weight of their infantry
into their greatest weakness.
2>Deception - Hannibal's deception was masterly.He kept his african reserves
well hidden from Roman eyes behind his cavalry.
3>Surprise - Hannibal once again achieved
total tactical surprise with his libyan phalanxes.He knew the battlefield didn't allow for ambushes or outflanking.His unique deployment made sure that the romans
ended up outflanking themselves.It was a gigantic ambush in open sight.
4>Leadership - The carthaginian senior commanders performed very well.Hasdrubal performed a
complicated cavalry manuevre as well as reorganizing his cavalry after 2 charges.Maharbal and mago too followed their instructions to the letter.The
timing of the carthaginians was superb.And on top was the
genius of hannibal.
5>Concentration and economy of Force - Hannibal unlike the romans didn't split his cavalry equally,
but concentrated them on his left to gain a decisive local superiority.He also kept his trump card uncommitted till the decisive moment.On the other hand,the
crescent shaped formation with 2 refused flanks was the embodiment of economy of force to delay the romans with minimal forces.
AFTERMATH :
Cannae sent shockwaves through Rome.It was the
republic's Darkest hour.In panic the senate gathered manpower from whatever source it could- criminals,freed slaves.Forces recalled from other fronts.Full mobilization of all male manpower was declared.The walls were fortified.But
hannibal never marched on rome.He sent and envoy to the senate offering moderate terms.But the senate refused to even meet him.
Any other state of the ancient world would have collapsed after a series of such crushing defeats -
but the romans decided to fight on.
There has been great debate as to
why hannibal didn't march on Rome immediately.Indeed maharbal urged him to saying- ''
Hannibal you know how to gain a victory ,but not how to use it''.
Later roman scholars claimed this decision saved Rome.However recent scholars on closer inspection contend that hannibal
just didn't have the manpower to lay siege to massive city like Rome with its defenses while still supplying it ,and
Rome still had manpower reserves left.A failed siege of Rome would have nullified the shock of cannae.However the
psychological impact of Hannibal's army outside Rome's gates
could well have shocked the romans into a treaty.The debate continues.
Much of Sicily and all of Southern italy revolted from Rome after cannae.But her closest latin allies and those in the north -
over 50% of Rome's manpower reserve remained loyal upsetting hannibal's calculation.He had been a hundred years too late.These had been absorbed into the roman confederacy long ago and accepted the romans over the foreign carthaginians
.Rome's Hydra like ability to come up with more men manifested itself again.
After cannae the
romans never again tried to defeat hannibal in pitched battle with a single large army.Under Fabius again,t
hey utilized several independent armies, still outnumbering the Punic forces in numbers of armies and soldiers. The war still had occasional battles, but was
focused on taking strongpoints and constant fighting according to the Fabian strategy.
When hannibal's army moved to defend one allied italian town,the several idependent armies of rome would
avoid pitched battle and concentrate on another carthaginian italian ally.All the while harassing his supply lines.The
carthaginian politicians abandoned hannibal in italy,prioritizing reinforcements to other sectors.
Still there was
one moment when the fate of the world hung in the balance.Hasdrubal,hannibal's brother arrived from iberia through the land route and attempted to link up with hannibal
.If he succeeded hannibal would finally have enough manpower to directly attack Rome.However as
luck would have it the romans intercepted hasdrubal's message to hannibal telling of his arrival in italy.
Hasdrubal's force was intercepted and destroyed at the Battle of Metaurus by a desperate roman army-hannibal
didn't even know he was there until it was too late and didn't move.For
16 yrs hannibal's army in italy rampaged through italy,abandoned by his home country.He reamined
undefeated winning more than 20 battles - but these were battles for strongpoints and cities.Not pitched battles of the earlier scale.On atleast 2 occasions more he destroyed whole roman armies.(not of the cannae scale)
As Roman
armies defeated carthage's remaining generals in iberia and Scipio africanus invaded africa and defeated 2 more carthaginian armies,the carthaginian senate recalled hannibal from italy,without most of his veteran army which was left behind for a
last hopeless battle with hastily raised levies against scipio's veterans and the now defected numidian cavalry,allied to rome at Zama.His first and only defeat.
Hannibal remains a
tragic hero of sorts.A man so brilliant that
he single handedly brought the greatest superpower of his time to the brink of destruction by sheer force of will and imagination.Rome never forgot Hannibal,even hundreds of years later in the heydays of the roman empire after carthage had faded from memory-a crisis was answered with the rallying cry
- 'Hannibal at the Gates'
He remained to history
Rome's greatest enemy and her worst nightmare.In this hannibal kept his oath.
LEGACY :
Cannae remained
the holy grail for tactical perfection for future commanders.From Frederick,Moltke and as late as the gulf war all tried to recreate a modern cannae.Germany's masterplan for World war I the Schlieffen Plan was to be the german general staff's modern recreation of cannae.The
scale of Hannibal's achievement can be measured by the fact that the other
2 great powers of the day - Macedon and The mighty Seleucids(who ruled over the entire middle east save egypt)
capitulated to the Romans after defeat in a single major battle against a single roman army(very shortly after end of 2nd punic war and with same armies and commanders) which had landed on their territory.Yet
these same Romans were so afraid of Hannibal that they let him
run rampant over Italy for
16 years without support from home,with a
polygot mercenary force -during this time he
destroyed at least 5 whole roman armies -the greatest of them at Cannae.Hannibal remains
one of history's greatest commanders, and if a man is to be
measured by his enemies, arguably the greatest of antiquity.
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Sources -
Osprey Campaign - Cannae
Cannae - Adrian Goldsworthy
Greece and Rome at War - Peter Conolly
Osprey -Roman Battle tactics 390 -110 BC
Military history Magazine
Roman Warfare -Adrian Goldsworthy
Osprey Warrior -Roman Republican Legionary
Net sources