On July 10, 48 BC, the Battle of Dyrrhachium took place, and Julius Caesar barely avoided a catastrophic defeat to Pompey in Macedonia.
Dyrrachium was a strong defensive position for Pompey. His back was guarded by the sea, and at his front there were hills that commanded the immediate area. This made an assault on the position nearly impossible. Caesar instead decided to revisit his Gallic Wars play-book and ordered his engineers to build walls and fortifications to pin Pompey against the sea. Pompey responded with walls and fortifications of his own to prevent any further advance. Between these two fortifications a no man's land was created which saw constant skirmishes with little or no gain—similar to the trench warfare of World War I. Caesar held the outlying farmland but it had been picked clean and Pompey, with the sea at his back, was able to be resupplied by ship. However, as the siege wore on, their positions began to change. Pompey found it difficult with the limited land he controlled to create enough fodder for his horses, and other supplies such as fresh water became more and more difficult to maintain. The autumn harvest was approaching and soon Caesar would have enough food to prolong his position. This caused Pompey to become desperate to break out of the siege. By mid summer, though, Pompey had a fortunate stroke of luck. Two Gallic auxiliaries were caught stealing the pay from legionaries, but managed to escape to Pompey. With these two men on his side, Pompey was able to discover the weakest point in Caesar's wall.[4] A section to the south of the lines hadn't yet been completed and it was the only viable target for attack.
The battle
Pompey mounted an attack of six legions against Caesar's line where it joined the sea and where the IX legion was stationed. Pompey also sent some auxiliaries and light infantry to attack by sea. Heavily outnumbering the Caesarian troops, the Pompeian troops broke through the weakened fortifications, causing the Ninth to pull back from the onslaught with heavy losses. Caesar swiftly reinforced the breach with 4,000 men, twelve cohorts under Mark Antony and then counterattacked, re-securing part of the wall and pushing Pompey's disordered forces back. Although Caesar's counterattack was initially successful, Pompey's forces were simply too numerous. Some days earlier Pompey had occupied a small camp that had been abandoned by Caesar, and enlarged the defences. Caesar responded by sending 33 cohorts to attack this position. Although the attack was initially successful, the Caesarian troops were outnumbered 2-1 and Pompey's troops fought hard. Pompey sent a large force of infantry and 3,000 cavalry to outflank Caesar's right wing. Caesar first ordered his troops on the right to stand firm, but then saw the danger of being outflanked. He ordered a retreat which soon became a panicked and disordered rout. The counterattack on Pompey's camp disintegrated completely. At first Caesar personally tried to stem the retreat, but the fleeing troops did not stop until they reached their own camps. After the failure of the counterattack and considering the losses incurred, Caesar resolved to give up attempting to besiege Pompey and to change the entire strategy of the campaign.
Aftermath
Pompey ordered a halt, believing that Caesar had been decisively beaten, and also suspecting a trap. According to Plutarch, Caesar remarked on that decision saying, "Today the victory had been the enemy's, had there been any one among them to gain it."[5]
Caesar, by various stratagems, managed to retreat south with the remainder of his army and avoided being caught by the pursuing cavalry of Pompey. He sent some of his cohorts to reinforce the garrisons of Apollonia and Oricum, and propelled the bulk of his remaining troops into Thessaly. The Caesarian general Gnaeus Domitius Calvinus and the Pompeian general Scipio Nasica were both in that country with their respective armies, and both Caesar and Pompey then aimed to link up with their corresponding forces in Thessaly. Upon entering Thessaly, Caesar captured the town of Gomphi and regrouped with Domitius, allowing his men to resupply, rest and then move towards Pharsalus, where the decisive battle would soon be fought.
"Dyrrachium was a strong defensive position for Pompey. His back was guarded by the sea, and at his front there were hills that commanded the immediate area. This made an assault on the position nearly impossible. Caesar instead decided to revisit his Gallic Wars play-book and ordered his engineers to build walls and fortifications to pin Pompey against the sea. Pompey responded with walls and fortifications of his own to prevent any further advance. Between these two fortifications a no man's land was created which saw constant skirmishes with little or no gain—similar to the trench warfare of World War I. Caesar held the outlying farmland but it had been picked clean and Pompey, with the sea at his back, was able to be resupplied by ship. However, as the siege wore on, their positions began to change. Pompey found it difficult with the limited land he controlled to create enough fodder for his horses, and other supplies such as fresh water became more and more difficult to maintain. The autumn harvest was approaching and soon Caesar would have enough food to prolong his position. This caused Pompey to become desperate to break out of the siege. By mid summer, though, Pompey had a fortunate stroke of luck. Two Gallic auxiliaries were caught stealing the pay from legionaries, but managed to escape to Pompey. With these two men on his side, Pompey was able to discover the weakest point in Caesar's wall.[4] A section to the south of the lines hadn't yet been completed and it was the only viable target for attack.
The battle
Pompey mounted an attack of six legions against Caesar's line where it joined the sea and where the IX legion was stationed. Pompey also sent some auxiliaries and light infantry to attack by sea. Heavily outnumbering the Caesarian troops, the Pompeian troops broke through the weakened fortifications, causing the Ninth to pull back from the onslaught with heavy losses. Caesar swiftly reinforced the breach with 4,000 men, twelve cohorts under Mark Antony and then counterattacked, re-securing part of the wall and pushing Pompey's disordered forces back. Although Caesar's counterattack was initially successful, Pompey's forces were simply too numerous. Some days earlier Pompey had occupied a small camp that had been abandoned by Caesar, and enlarged the defences. Caesar responded by sending 33 cohorts to attack this position. Although the attack was initially successful, the Caesarian troops were outnumbered 2-1 and Pompey's troops fought hard. Pompey sent a large force of infantry and 3,000 cavalry to outflank Caesar's right wing. Caesar first ordered his troops on the right to stand firm, but then saw the danger of being outflanked. He ordered a retreat which soon became a panicked and disordered rout. The counterattack on Pompey's camp disintegrated completely. At first Caesar personally tried to stem the retreat, but the fleeing troops did not stop until they reached their own camps. After the failure of the counterattack and considering the losses incurred, Caesar resolved to give up attempting to besiege Pompey and to change the entire strategy of the campaign.
Aftermath
Pompey ordered a halt, believing that Caesar had been decisively beaten, and also suspecting a trap. According to Plutarch, Caesar remarked on that decision saying, "Today the victory had been the enemy's, had there been any one among them to gain it."[5]
Caesar, by various stratagems, managed to retreat south with the remainder of his army and avoided being caught by the pursuing cavalry of Pompey. He sent some of his cohorts to reinforce the garrisons of Apollonia and Oricum, and propelled the bulk of his remaining troops into Thessaly. The Caesarian general Gnaeus Domitius Calvinus and the Pompeian general Scipio Nasica were both in that country with their respective armies, and both Caesar and Pompey then aimed to link up with their corresponding forces in Thessaly. Upon entering Thessaly, Caesar captured the town of Gomphi and regrouped with Domitius, allowing his men to resupply, rest and then move towards Pharsalus, where the decisive battle would soon be fought."