King Khosrou's army included several divisions of infantry. He argued from this that Khosrou did not intend this time to raid across the desert to Chalcis, but to follow up the river until he reached Zeugma, with its hospitable and unfortressed road to Antioch. But before coming to Zeugma Khosrou would have to pass by Hierapolis and Carchemish (Carchemish is one day's march down the river from Zeugma, but Hierapolis three days' march, a little to the westward). He would be surprised to find an army opposing him at Carchemish, an open town, instead of being locked up safely in Hicrapolis. To Carchemish presently came the remaining 5,000 men of the Household Regiment, and Boutzces from Hicrapolis with 1,000, and 2,000 more from Carrhae and Zeugma. This made 13,000 men in all.
King Khosrou, travelling slowly with his 200,000, had now reached Barbalissus, where the Euphrates makes its right-angled turn. He did not know what was best for him to do. He had expected that the mere threat of his approach would clear the way for him, but his scouts reported a large Roman army at Carchemish, commanded by Belisarius. He could not now raid into Palestine with his cavalry alone, because that would mean leaving his infantry behind: unsupported by cavalry and unprotected by walls, it would be an easy prey to the enemy. He could proceed up the river and fight with this army at Carchemish; but, in order to do so, would it not be wise first to capture Hierapolis, which threatened his flank? And when had Belisarius ever lost a battle fought on the defensive? If he only knew what forces Belisarius commanded he could decide whether or not to risk a battle. He therefore sent an ambassador to Belisarius, ostensibly to discuss peace terms, but actually to look about him and report on the condition of the Imperial Army.
Belisarius, being warned that the Ambassador was on his way, guessed his intentions. He went out a few miles beyond Carchemish with the Household Regiment and encamped on a hill; and there made careful preparations for the Ambassador's reception. By his orders, none of the men wore mail-shirts or helmets or carried shields; each was armed with some slight weapon only — a bow, an axe, or a lance, according to his race — and clothed in clean white-linen tunic and trousers.
As the Ambassador, a Mage, came riding that afternoon along the river-road, a hare darted by, pursued by a number of dark men with hooked noses, mounted on racing horses; and as the hare doubled the leader killed it with a javelin cast. They paid no attention to the Ambassador until he greeted them, in Persian. They answered in Camp Latin, which the Mage understood; and he learned that they were Moors — not Assyrians as he had supposed — from beyond the Pillars of Hercules.
'How do you happen to be here so far away from your homes?' asked the surprised Ambassador.
'Oh,' they replied, 'Belisarius forced our kings to submit to him, and we gladly enlisted in his service, because he is the greatest general that the world has ever known and has made us rich and famous. But who are you?'
'I am the Ambassador of the Great King of Persia.'
'Oh, yes,' they replied politely. 'The same whose armies our Lord Belisarius defeated at Daras and at Sisauranum. Do you perhaps wish to sec our master? He is most hospitable. Let us escort you to his tent.'
They led the way forward, and presently they passed two parties of horsemen on a level plain tilting together with blunt lances. The men of one party had fair hair and ruddy faces; those of the other, for the most part, auburn hair and delicate skins; both were large, strong men on large, strong horses. The Ambassador asked:' What men are those?'
'Oh, those are Ostrogoths and Vandals. The Vandals come from the coast of North Africa about Carthage, which my Lord Belisarius won back for the Empire; but the Goths from Italy, another of his conquests. Would you care to observe these men closely? They are new-comers to your part of the world.'
The Moors whistled on their fingers, and a mixed party of Goths and Vandals rode up.
The Ambassador spoke to them. 'So you are captives, eh, forced to serve the Emperor of the Romans?'
A Goth replied: 'We serve no man unwillingly. It is our pleasure to serve the Lord Belisarius because he is making us perfect in the arts of war. When we return to our own lands we shall be men of credit.'
Next, a troop of slant-eyed, short-legged Huns dashed past the Ambassador with a wild shout; he learned that they were Herulians from beyond the Black Sea. They also spoke in reverent praise of Belisarius. All around him in the plain the Mage could see groups of the Household Regiment at their field-sports — tilting, shooting at a mark, spearing tent-pegs, wrestling from horseback, driving a leather ball about with crooked sticks.
Then suddenly the trumpet blew the Alert. In a moment all games ceased; every troop formed up speedily under its pennant and trotted to join its own squadron. At another trumpet call, with promptness and precision, the squadrons formed up in two long double lines, making an avenue of welcome. The Ambassador passed through, feeling rather uncomfortable, I imagine. There were 6,000 of them, and never was a finer choice of men ever brought together. They appeared far less interested in him than he in them, and eager to return to their sports. At the top of the hill was pitched Belisarius's tent of plain canvas. Belisarius sat before it on a tree-stump, without even his general's cloak, wearing white linen like his men, and looking as if he had never a care in the world. After exchanging salutations with the Ambassador he ordered the trumpeter to blow the Dismiss. The 6,000 men returned with a cheer to the plain.
The Ambassador asked: 'Arc you indeed Belisarius? I expected to find a man in gilded armour, with servitors in crimson-silk uniform ranged about him.'
Belisarius replied: 'Had your royal Master wanted us of your approach, we should have received you with greater formality, not in this undress. However, we are soldiers, not courtiers, and wear no scarlet or gold.'
The Ambassador delivered his message. He said that the Great King was at hand, his armies being like locusts in numbers, and wished to discuss peace terms.
Belisarius laughed softly. 'I have fought in many lands and observed many strange customs, but never before have I met a case like this — a king who is at pains to bring 200,000 soldiers with him in order to discuss peace terms. Tell your royal Master that our country, though hospitable, cannot act as host for so lavish a retinue as this. When he has dismissed them I shall be prepared to discuss peace terms in an amicable fashion. I will grant him an armistice of five days in which to send them back home across the Euphrates. I thank your Excellency for visiting us.'
The Ambassador returned and reported to Khosrou: 'My advice, Great King, is to return home at once. If their main body resemble their advance guard in the least respect, then you are utterly lost. For discipline, manliness, and skill in arms I have never seen their like. Moreover, it is clear that they are very numerous; they would not otherwise dare to base themselves on an uuwalled town like Car-chemish or behave with such confidence when on outpost duty. As for their general, Belisarius: in my quality of Mage I am accustomed to read the souls of men, and I sec joined in him all the military and moral virtues which our primitive ancestors esteemed. You cannot risk a battle with such a man. If you make the smallest mistake, not one of your men will ever see Babylon again.'
Khosrou believed the Ambassador because he spoke without flattery. He decided to return, though even this seemed a dangerous course to take, with Belisarius's army threatening his rear. The nearest way home was over the Euphrates and back by way of Mesopotamia, but on the farther bank of the river he had seen ten or twenty troops of Roman cavalry, who appeared, by the continual smoke-signals that they sent back across the plain towards Edessa, to be the vanguard of another army. He was afraid to attempt a crossing, for fear of being attacked in the midst of operations; though this 'other army' had no real existence — what Khosrou had seen was only 1,000 of Belisarius's troops from Carrhae, making the most of themselves. But the Mage pointed out that Belisarius had never yet broken his word and that if King Khosrou crossed the river within the five days allowed, he would be safe enough.
Khosrou crossed in a hurry, unmolested. Persian armies always carry bridging material with them (short timbers which hook together), and therefore the widest and swiftest streams present no obstacle to them. As soon as he was safe on the farther bank he sent a message to Belisarius, asking for an ambassador to discuss peace terms as he had promised.
Belisarius himself then crossed the Euphrates at Zeugma with all his forces. He sent an ambassador to tell King Khosrou that, if the Persian Army returned through Roman territory without doing any damage, Justinian would arrange with him that the terms agreed upon in the previous year were put into effect.
Khosrou consented to this, and the next day began his homeward march. But he was afraid to pass through Mesopotamia because of the imaginary army; so returned along the left bank of the Euphrates, putting his men on short rations. Belisarius began following him, always one day's journey behind, as he had done many years before with the Persian general Azareth. However, when he reached a point just opposite Barbalissus he was obliged to desist: he himself and nearly all his generals were recalled to Constantinople by a peremptory summons from the Emperor,
