As a wargamer of some years, I have 'played' a number of historical battles in my time (usually badly) and been concious that my knowledge of these is sketchy at best and in some cases positively embarassing.
So for me - and hopefully for you - I am starting a new blog series called 'Famous battles you should know about'. This will give a brief overview (including historical background and scope), tactical play and what each side did right (or wrong) so you can avoid the mistakes.
These will cover all periods (Ancients to WW2) and hopefully there is something for everyone to enjoy.
Completely randomly, the first battle is....Gaugamela (as you will know if you read the title of the blog!).
GAUGAMELA
Date : October 1st, 331BC
Combatants : Macedonians (Alexander) and Achaemenid Persians (Darius III)
Why is it important? The Macedonians won a crushing victory which led directly to the fall of the Persain Empire.
Location and territory : The general consensus is that the battle took place east of Mosul in Iraq.
Darius chose a flat, open plain where he could deploy his numerically superior forces, not wanting to be caught in a narrow battlefield as he had been at Issus two years earlier, where he was unable to properly deploy his huge army. Darius also had his soldiers flatten the terrain prior to the battle, so as to give his 200 war-chariots optimal conditions to operate in. On the ground were few hills and no bodies of water that Alexander could use for protection, and in the autumn the weather was dry and mild
Historical Context : Alexander had taken the Mediteranean coast of what is now Lebanon and Israel and, taken Egypt ans then advanced from Syria towards the heart of the Persian empire. He crossed both the Euphrates and Tigris rivers uncontested (as Darius was building up a massive army, drawing men from all parts of his empire to meet Alexander at a place of his choosing.
Just before the battle, Darius offered Alexander a generous peace agreement. Darius would cede half of the entire Persian Empire provided Alexander cease his invasion of Persia. When presented to Alexander, he declined the offer without any consideration at all. One of Alexander's generals, Parmenion, said that if he were Alexander, he would gladly accept the more-than-generous offer. Alexander replied, "And I would too, if I were Parmenion."
Troops :
Persians
Peltasts :10,000 - 30,000
Cavalry :12,000 - 40,000
Immortals : 10,000
Mercenary hoplites : 8,000 - 10,000
Bactrian cavalry : 1,000 - 2,000
Archers : 1,500
Scythed chariots : 200
War elephants : 15
Total :53,000 - 93,000 troops
Macedonians
Pikes and heavy infantry : 31,000
Peltasts :9,000
Cavalry :7,000
Alexander commanded a force from his kingdom of Macedon, Thracian allies, and the Corinthian League that—according to Arrian, the most reliable historian of Alexander (who is believed to be relying on the work of the eye-witness Ptolemy) numbered 7,000 cavalry and 40,000 infantry. Most historians agree that the Macedonian army consisted of 31,000 heavy infantry, including the Greek hoplites in reserve, with an additional 9,000 light infantry consisting mainly of peltasts with some archers. The size of the Macedonian mounted arm was about 7,000.
Ancient sources :
According to Arrian, Darius's force numbered 40,000 cavalry and 1,000,000 infantry.
Diodorus Siculus put it at 200,000 cavalry and 800,000 infantry
Plutarch put it at 1,000,000 troops (without a breakdown in composition)
Curtius Rufus said it consisted of 45,000 cavalry and 200,000 infantry.
Furthermore according to Arrian,[Diodorus, and Curtius, Darius had 200 chariots while Arrian mentions 15 war elephants
While Darius had a significant advantage in numbers, most of his troops were of a lower quality than Alexander's. Alexander's pezhetairoi were armed with a six-meter spear, the sarissa. The main Persian infantry was poorly trained and equipped in comparison to Alexander's pezhetairoi and hoplites.
The only respectable infantry Darius had were his 10,000 Greek hoplites and his personal bodyguard, the 10,000 Persian Immortals. The Greek mercenaries fought in a phalanx, armed with a heavy shield but with spears no longer than three meters, while the spears of the Immortals were 2 meters long. Among the other Persian troops, the most heavily armed were the Armenians who were armed the Greek way, and probably fought as a phalanx. The rest of Darius's contingents were much more lightly armed; the main weapon of the Achaemenid army historically was the bow and arrow, and javelin.
Timing : Alexander's generals suggested that to counter the overwhelming number of Persians, a surprise night attack should be launched. Alexander dismissed this idea, proclaiming that he would not "steal his victory". As it turned out Alexander's dismissal of the night attack option was either a lucky move, or a stroke of genius. Darius, fearing a night attack, kept his army awake and on alert for the whole night, while Alexander's was allowed to sleep. The next morning, Alexander himself over-slept. When his concerned generals woke him, he stated matter-of-factly that the battle had already been won.
The Battle
Initial Dispositions
The battle began with the Persians already present at the battlefield. Darius had recruited the finest cavalry from his Eastern satrapies and from an allied Scythian tribe. Darius also deployed scythed chariots for which he had ordered bushes and vegetation removed from the battlefield to maximize their effectiveness. He also had 15 Indian elephants supported by Indian chariots.
Darius placed himself in the center with his best infantry as was the tradition among Persian kings. He was surrounded by, on his right, the Carian cavalry, Greek mercenaries, and the Persian horse guards. In the right-center he placed the Persian foot guards (Apple Bearers/Immortals to the Greeks), the Indian Cavalry and his Mardian archers.
On both flanks were the cavalry. Bessus commanded the left flank with the Bactrians, Dahae cavalry, Arachosian cavalry, Persian cavalry, Susian cavalry, Cadusian cavalry, and Scythians. Chariots were placed in front with a small group of Bactrians. Mazaeus commanded the right flank with the Syrian, Median, Mesopotamian, Parthian, Sacian, Tapurian, Hyrcanian, Caucasian Albanian, Sacesinian, Cappadocian, and Armenian cavalry. The Cappadocians and Armenians were stationed in front of the other cavalry units, and led the attack. The Albanian and Sacesinian cavalry were sent around to flank the Macedonian left.
The Macedonians were divided into two, with the right side of the army falling under the direct command of Alexander, and the left to Parmenion. Alexander fought with his Companion cavalry. With it were the Paionian, and Macedonian light cavalry.
The mercenary cavalry was divided into two groups, with the veterans being stationed on the flank of the right, and the rest being put in front of the Agrians and Macedonian archers which were stationed next to the phalanx. Parmenion was stationed on the left with the Thessalian, Greek mercenary, and Thracian cavalry units. There they were to pull off a holding maneuver while Alexander landed the decisive blow from the right.
On the right-center of the formation were Cretan mercenaries. Behind them was a group of Thessalian cavalry under Phillip, and Achaean mercenaries. To their right was another part of the allied Greek cavalry. From there came the phalanx, which was placed into a double-line.
Outnumbered over 5:1 in cavalry, with their line surpassed by over a mile, it seemed inevitable that the Macedonians would be flanked by the Persians. The second line were given orders to deal with any flanking units should the situation arise. This second line consisted of mostly mercenaries.
The Battle begins :
Alexander began by ordering his infantry to march in phalanx formation towards the center of the enemy line. The Macedonians advanced with the wings echeloned back at 45 degree angles to lure the Persian cavalry to attack. While the phalanxes battled the Persian infantry, Darius sent a large part of his cavalry and some of his regular infantry to attack Parmenion's forces on the left.
During the battle Alexander used an unusual strategy which has been duplicated only a few times throughout history. While the infantry battled the Persian troops in the center, Alexander began to ride all the way to the edge of the right flank, accompanied by his Companion Cavalry. His plan was to draw as much of the Persian cavalry as possible to the flanks. The purpose of this was to create a gap within the enemy line where a decisive blow could then be struck at Darius in the center. This required almost perfect timing and maneuvering, and Alexander himself to act first. Alexander would force Darius to attack (as they would soon move off the prepared ground) though Darius did not want to be the first to attack after seeing what happened at Issus against a similar formation. In the end Darius's hand was forced, and he attacked.
Darius now launched his chariots, some of which were intercepted by the Agrianians (javelin throwers). It is said that the Macedonian army had trained for a new tactic to counter these devastating chariots if they ran into their ranks: The first lines would step aside, opening a gap. The horse would refuse to run into the spears of the front ranks, and enter the "mouse trap", only to be stopped by the spears of the rear ranks. The charioteers and their horses could then be killed at leisure. This rendered the Persian chariots useless. Never again, except by Boudica, would the chariot be used as a significant weapon of war.
.jpg)
The Centre (Alexander's attack)
As the Persians advanced farther and farther to the Macedonian flanks in their attack, Alexander slowly filtered in his rear-guard. Alexander disengaged his Companions, and prepared for the decisive attack on the Persians. Leading the way, he formed his units into a giant wedge, with him leading the charge. Behind them were the guards brigade along with any phalanx battalions he could withdraw from the battle. These were follow-up light troops.
Alexander took most of his cavalry and moved parallel to Darius's front lines, heading off of the prepared battlefield. In response, Darius ordered his cavalry in the front lines to block Alexander's force. Unbeknownst to Darius, Alexander hid a force of peltasts (light infantry armed with slings, javelins, and shortbows) behind his horsemen and Alexander slowly sent his force into an angle, heading toward the Persian host, until finally a gap opened between Bessus's left and Darius's center and Alexander sent in his cavalry force to drive down the gap in the Persian line in a wedge formation. At the same time, the peltasts engaged the cavalry, in order to keep them from riding back to engage Alexander's charging cavalry. The Persian infantry at the center were still fighting the phalanxes, hindering any attempts to counter Alexander's charge.
This large wedge then smashed right into the weakened Persian center, taking out Darius's royal guard, and the Greek mercenaries. Bessus on the left, now cut off from Darius, and fearing he would be struck with this wedge, began to pull back his forces. Darius was in danger of himself being cut off, and the widely held modern view is that he now broke and ran, with the rest of his army following him.
This is based on Arrian's account (Anabasis 3.14):
While holding on the left, a gap had also opened up between the left and center of the Macedonian line. The Persian and Indian cavalry units stationed in the center with Darius broke through. Instead of taking the phalanx or Parmenion in the rear, however, they continued on towards the camp to loot. They also tried to rescue the Queen Mother Sisygambis but she refused to go with them.
Meanwhile, as the center and Darius broke, Mazaeus also began to pull his forces back as Bessus had. However, unlike on the left with Bessus, the Persians soon fell into disorder as the Thessalians and other cavalry units charged forward at their fleeing enemy.
Aftermath : After the battle, Parmenion rounded up the Persian baggage train while Alexander and his own bodyguard pursued Darius. As at Issus, substantial amounts of loot were gained following the battle, with 4,000 talents captured, as well as the King's personal chariot and bow. The war elephants were also captured. In all, it was a disastrous defeat for the Persians and one of Alexander's finest victories.
Darius had managed to escape the battle with a small core of his forces remaining intact. The Bactrian cavalry and Bessus managed to catch up with him, as did some of the survivors of the Royal Guard and 2,000 Greek mercenaries.
At this point, the Persian Empire was divided into two halves–East and West. On his escape, Darius gave a speech to what remained of his army. He planned to head further east and raise another army to face Alexander, assuming that the Macedonians would head towards Babylon. At the same time, he dispatched letters to his eastern satraps asking them to remain loyal.
The satraps, however, had other intentions. Bessus murdered Darius before fleeing eastwards. When Alexander discovered Darius murdered, he was saddened to see an enemy he respected killed in such a fashion, and gave Darius full burial and ceremony at Persepolis, the once ceremonial capital of the Persian Empire, before angrily pursuing Bessus, eventually capturing and executing him the following year. The majority of the remaining satraps gave their loyalty to Alexander and were allowed to keep their positions. The Persian Empire is traditionally considered to have ended with the death of Darius.
Wargaming Guagamela
Irrespective of the rule set you use, there are key elements to consider when replaying this battle.
Terrain : flat as a pancake or just a couple of gentle hills. No rivers, BUA's or anything else. Except maybe a couple of goats.
Troops : the difficulty here is representing the numbers. Clearly you can't field anything like a million troops so the 100k level does look more realistic. This is still twice the number of the Macedonians which provides scope for outflanking.
The balance needs to come in troop quality. Most of the Macedonians should be consdidered Elite and Superior (or similar) while anything other than the cavalry, hoplites and Immortals on the Persian side can be considered Poor (or similar).
Base the troop figures on the tables above (with similar ratios). So the Persians have 3x more peltasts, which aren't much good.
Camp
In some rules, taking the baggage / camp of the opponent can have a measurable impact on the outcome of the battle. Clearly the Persians took the Macedonian baggage during the battle but it did not concede much in the way of victory. Therefore halve the normal effect of losing a camp for this battle (e.g. in FOG it equates to just 1 BG, not two).
Set-up
The Persian army should set up in its entirety before the Macedonian player.
Other factors
Another balancing factor you could use (to reflect the lack of sleep on the side of the Persians) is to have them fight at a disadvantage (so Elite troops become Superior, Superior become Average etc.) or lose a VBU etc.
So for me - and hopefully for you - I am starting a new blog series called 'Famous battles you should know about'. This will give a brief overview (including historical background and scope), tactical play and what each side did right (or wrong) so you can avoid the mistakes.
These will cover all periods (Ancients to WW2) and hopefully there is something for everyone to enjoy.
Completely randomly, the first battle is....Gaugamela (as you will know if you read the title of the blog!).
GAUGAMELA
Date : October 1st, 331BC
Combatants : Macedonians (Alexander) and Achaemenid Persians (Darius III)
Why is it important? The Macedonians won a crushing victory which led directly to the fall of the Persain Empire.
Location and territory : The general consensus is that the battle took place east of Mosul in Iraq.
Darius chose a flat, open plain where he could deploy his numerically superior forces, not wanting to be caught in a narrow battlefield as he had been at Issus two years earlier, where he was unable to properly deploy his huge army. Darius also had his soldiers flatten the terrain prior to the battle, so as to give his 200 war-chariots optimal conditions to operate in. On the ground were few hills and no bodies of water that Alexander could use for protection, and in the autumn the weather was dry and mild
Historical Context : Alexander had taken the Mediteranean coast of what is now Lebanon and Israel and, taken Egypt ans then advanced from Syria towards the heart of the Persian empire. He crossed both the Euphrates and Tigris rivers uncontested (as Darius was building up a massive army, drawing men from all parts of his empire to meet Alexander at a place of his choosing.
Just before the battle, Darius offered Alexander a generous peace agreement. Darius would cede half of the entire Persian Empire provided Alexander cease his invasion of Persia. When presented to Alexander, he declined the offer without any consideration at all. One of Alexander's generals, Parmenion, said that if he were Alexander, he would gladly accept the more-than-generous offer. Alexander replied, "And I would too, if I were Parmenion."
Troops :
Persians
Peltasts :10,000 - 30,000
Cavalry :12,000 - 40,000
Immortals : 10,000
Mercenary hoplites : 8,000 - 10,000
Bactrian cavalry : 1,000 - 2,000
Archers : 1,500
Scythed chariots : 200
War elephants : 15
Total :53,000 - 93,000 troops
Macedonians
Pikes and heavy infantry : 31,000
Peltasts :9,000
Cavalry :7,000
Alexander commanded a force from his kingdom of Macedon, Thracian allies, and the Corinthian League that—according to Arrian, the most reliable historian of Alexander (who is believed to be relying on the work of the eye-witness Ptolemy) numbered 7,000 cavalry and 40,000 infantry. Most historians agree that the Macedonian army consisted of 31,000 heavy infantry, including the Greek hoplites in reserve, with an additional 9,000 light infantry consisting mainly of peltasts with some archers. The size of the Macedonian mounted arm was about 7,000.
Ancient sources :
According to Arrian, Darius's force numbered 40,000 cavalry and 1,000,000 infantry.
Diodorus Siculus put it at 200,000 cavalry and 800,000 infantry
Plutarch put it at 1,000,000 troops (without a breakdown in composition)
Curtius Rufus said it consisted of 45,000 cavalry and 200,000 infantry.
Furthermore according to Arrian,[Diodorus, and Curtius, Darius had 200 chariots while Arrian mentions 15 war elephants
While Darius had a significant advantage in numbers, most of his troops were of a lower quality than Alexander's. Alexander's pezhetairoi were armed with a six-meter spear, the sarissa. The main Persian infantry was poorly trained and equipped in comparison to Alexander's pezhetairoi and hoplites.
The only respectable infantry Darius had were his 10,000 Greek hoplites and his personal bodyguard, the 10,000 Persian Immortals. The Greek mercenaries fought in a phalanx, armed with a heavy shield but with spears no longer than three meters, while the spears of the Immortals were 2 meters long. Among the other Persian troops, the most heavily armed were the Armenians who were armed the Greek way, and probably fought as a phalanx. The rest of Darius's contingents were much more lightly armed; the main weapon of the Achaemenid army historically was the bow and arrow, and javelin.
Timing : Alexander's generals suggested that to counter the overwhelming number of Persians, a surprise night attack should be launched. Alexander dismissed this idea, proclaiming that he would not "steal his victory". As it turned out Alexander's dismissal of the night attack option was either a lucky move, or a stroke of genius. Darius, fearing a night attack, kept his army awake and on alert for the whole night, while Alexander's was allowed to sleep. The next morning, Alexander himself over-slept. When his concerned generals woke him, he stated matter-of-factly that the battle had already been won.
The Battle
Initial Dispositions
The battle began with the Persians already present at the battlefield. Darius had recruited the finest cavalry from his Eastern satrapies and from an allied Scythian tribe. Darius also deployed scythed chariots for which he had ordered bushes and vegetation removed from the battlefield to maximize their effectiveness. He also had 15 Indian elephants supported by Indian chariots.
Darius placed himself in the center with his best infantry as was the tradition among Persian kings. He was surrounded by, on his right, the Carian cavalry, Greek mercenaries, and the Persian horse guards. In the right-center he placed the Persian foot guards (Apple Bearers/Immortals to the Greeks), the Indian Cavalry and his Mardian archers.
On both flanks were the cavalry. Bessus commanded the left flank with the Bactrians, Dahae cavalry, Arachosian cavalry, Persian cavalry, Susian cavalry, Cadusian cavalry, and Scythians. Chariots were placed in front with a small group of Bactrians. Mazaeus commanded the right flank with the Syrian, Median, Mesopotamian, Parthian, Sacian, Tapurian, Hyrcanian, Caucasian Albanian, Sacesinian, Cappadocian, and Armenian cavalry. The Cappadocians and Armenians were stationed in front of the other cavalry units, and led the attack. The Albanian and Sacesinian cavalry were sent around to flank the Macedonian left.
The Macedonians were divided into two, with the right side of the army falling under the direct command of Alexander, and the left to Parmenion. Alexander fought with his Companion cavalry. With it were the Paionian, and Macedonian light cavalry.
The mercenary cavalry was divided into two groups, with the veterans being stationed on the flank of the right, and the rest being put in front of the Agrians and Macedonian archers which were stationed next to the phalanx. Parmenion was stationed on the left with the Thessalian, Greek mercenary, and Thracian cavalry units. There they were to pull off a holding maneuver while Alexander landed the decisive blow from the right.
On the right-center of the formation were Cretan mercenaries. Behind them was a group of Thessalian cavalry under Phillip, and Achaean mercenaries. To their right was another part of the allied Greek cavalry. From there came the phalanx, which was placed into a double-line.
Outnumbered over 5:1 in cavalry, with their line surpassed by over a mile, it seemed inevitable that the Macedonians would be flanked by the Persians. The second line were given orders to deal with any flanking units should the situation arise. This second line consisted of mostly mercenaries.
The Battle begins :
Alexander began by ordering his infantry to march in phalanx formation towards the center of the enemy line. The Macedonians advanced with the wings echeloned back at 45 degree angles to lure the Persian cavalry to attack. While the phalanxes battled the Persian infantry, Darius sent a large part of his cavalry and some of his regular infantry to attack Parmenion's forces on the left.
During the battle Alexander used an unusual strategy which has been duplicated only a few times throughout history. While the infantry battled the Persian troops in the center, Alexander began to ride all the way to the edge of the right flank, accompanied by his Companion Cavalry. His plan was to draw as much of the Persian cavalry as possible to the flanks. The purpose of this was to create a gap within the enemy line where a decisive blow could then be struck at Darius in the center. This required almost perfect timing and maneuvering, and Alexander himself to act first. Alexander would force Darius to attack (as they would soon move off the prepared ground) though Darius did not want to be the first to attack after seeing what happened at Issus against a similar formation. In the end Darius's hand was forced, and he attacked.
Darius now launched his chariots, some of which were intercepted by the Agrianians (javelin throwers). It is said that the Macedonian army had trained for a new tactic to counter these devastating chariots if they ran into their ranks: The first lines would step aside, opening a gap. The horse would refuse to run into the spears of the front ranks, and enter the "mouse trap", only to be stopped by the spears of the rear ranks. The charioteers and their horses could then be killed at leisure. This rendered the Persian chariots useless. Never again, except by Boudica, would the chariot be used as a significant weapon of war.
.jpg)
The Centre (Alexander's attack)
As the Persians advanced farther and farther to the Macedonian flanks in their attack, Alexander slowly filtered in his rear-guard. Alexander disengaged his Companions, and prepared for the decisive attack on the Persians. Leading the way, he formed his units into a giant wedge, with him leading the charge. Behind them were the guards brigade along with any phalanx battalions he could withdraw from the battle. These were follow-up light troops.
Alexander took most of his cavalry and moved parallel to Darius's front lines, heading off of the prepared battlefield. In response, Darius ordered his cavalry in the front lines to block Alexander's force. Unbeknownst to Darius, Alexander hid a force of peltasts (light infantry armed with slings, javelins, and shortbows) behind his horsemen and Alexander slowly sent his force into an angle, heading toward the Persian host, until finally a gap opened between Bessus's left and Darius's center and Alexander sent in his cavalry force to drive down the gap in the Persian line in a wedge formation. At the same time, the peltasts engaged the cavalry, in order to keep them from riding back to engage Alexander's charging cavalry. The Persian infantry at the center were still fighting the phalanxes, hindering any attempts to counter Alexander's charge.
- "For a short time there ensued a hand-to-hand fight; but when the Macedonian cavalry, commanded by Alexander himself, pressed on vigorously, thrusting themselves against the Persians and striking their faces with their spears, and when the Macedonian phalanx in dense array and bristling with long pikes had also made an attack upon them, all things together appeared full of terror to Darius, who had already long been in a state of fear, so that he was the first to turn and flee."[6]
- The twenty-fourth [day of the lunar month], in the morning, the king of the world [i.e., Alexander] [erected his] standard [lacuna]. Opposite each other they fought and a heavy defeat of the troops [of the king he inflicted]. The king [i.e., Darius], his troops deserted him and to their cities [they went]. They fled to the land of the Guti.
While holding on the left, a gap had also opened up between the left and center of the Macedonian line. The Persian and Indian cavalry units stationed in the center with Darius broke through. Instead of taking the phalanx or Parmenion in the rear, however, they continued on towards the camp to loot. They also tried to rescue the Queen Mother Sisygambis but she refused to go with them.
Meanwhile, as the center and Darius broke, Mazaeus also began to pull his forces back as Bessus had. However, unlike on the left with Bessus, the Persians soon fell into disorder as the Thessalians and other cavalry units charged forward at their fleeing enemy.
Aftermath : After the battle, Parmenion rounded up the Persian baggage train while Alexander and his own bodyguard pursued Darius. As at Issus, substantial amounts of loot were gained following the battle, with 4,000 talents captured, as well as the King's personal chariot and bow. The war elephants were also captured. In all, it was a disastrous defeat for the Persians and one of Alexander's finest victories.
Darius had managed to escape the battle with a small core of his forces remaining intact. The Bactrian cavalry and Bessus managed to catch up with him, as did some of the survivors of the Royal Guard and 2,000 Greek mercenaries.
At this point, the Persian Empire was divided into two halves–East and West. On his escape, Darius gave a speech to what remained of his army. He planned to head further east and raise another army to face Alexander, assuming that the Macedonians would head towards Babylon. At the same time, he dispatched letters to his eastern satraps asking them to remain loyal.
The satraps, however, had other intentions. Bessus murdered Darius before fleeing eastwards. When Alexander discovered Darius murdered, he was saddened to see an enemy he respected killed in such a fashion, and gave Darius full burial and ceremony at Persepolis, the once ceremonial capital of the Persian Empire, before angrily pursuing Bessus, eventually capturing and executing him the following year. The majority of the remaining satraps gave their loyalty to Alexander and were allowed to keep their positions. The Persian Empire is traditionally considered to have ended with the death of Darius.
Wargaming Guagamela
Irrespective of the rule set you use, there are key elements to consider when replaying this battle.
Terrain : flat as a pancake or just a couple of gentle hills. No rivers, BUA's or anything else. Except maybe a couple of goats.
Troops : the difficulty here is representing the numbers. Clearly you can't field anything like a million troops so the 100k level does look more realistic. This is still twice the number of the Macedonians which provides scope for outflanking.
The balance needs to come in troop quality. Most of the Macedonians should be consdidered Elite and Superior (or similar) while anything other than the cavalry, hoplites and Immortals on the Persian side can be considered Poor (or similar).
Base the troop figures on the tables above (with similar ratios). So the Persians have 3x more peltasts, which aren't much good.
Camp
In some rules, taking the baggage / camp of the opponent can have a measurable impact on the outcome of the battle. Clearly the Persians took the Macedonian baggage during the battle but it did not concede much in the way of victory. Therefore halve the normal effect of losing a camp for this battle (e.g. in FOG it equates to just 1 BG, not two).
Set-up
The Persian army should set up in its entirety before the Macedonian player.
Other factors
Another balancing factor you could use (to reflect the lack of sleep on the side of the Persians) is to have them fight at a disadvantage (so Elite troops become Superior, Superior become Average etc.) or lose a VBU etc.