At the fires that evening, Tsubodai rode through the camp of his ten thousand. The dead knights had been stripped of anything valuable and the general had pleased the men by refusing his personal tithe. For those who received no pay for their battles, the collection of bloodstained lockets, rings and gems was something to covet in the new society Genghis was creating. A man could become wealthy in the army of the tribes, though they thought always in terms of the horses they could buy with their riches. The knights’ forges were of more interest to Tsubodai, as were the spoked cartwheels themselves, ringed in iron and easier to repair than the solid discs the Mongols used. Tsubodai had already instructed the captured armourers to demonstrate the skill to his carpenters.

Jochi was examining the forehoof of his favourite pony when Tsubodai trotted up to him. Before the younger man could bow, Tsubodai inclined his head, giving him honour. The jagun Jochi had commanded stood with pride.

Tsubodai lifted his hand to show Jochi the gold paitze he had taken from him before noon.

‘You had me wondering how Russians could come back from the dead,’ Tsubodai said. ‘It was a bold stroke. Take this back, Jochi. You are worth more than silver.’

He tossed the gold plaque through the air and Jochi caught it, struggling to keep his composure. Only the praise of Genghis himself would have meant more at that moment.

‘We will ride home tomorrow,’ Tsubodai said, as much for the men as Jochi. ‘Be ready at dawn.’

Chagatai felt an itch in his left armpit, where sweat dribbled under his best armour. Though he was the second son of the khan, he sensed it would not be right to give the spot a good scratch while he waited for the king of Koryo.

He risked a quick glance at the man who had brought him to the distant, walled city of Songdo. The hall of kings was stifling in the midday heat, but Jelme showed no discomfort in his lacquered armour. Like the courtiers and the royal guards, the Mongol general could have been carved out of wood.

Chagatai could hear water running in the far distance, the gentle sound somehow magnified in the oppressive heat and silence. The itch became maddening and he struggled to think of something else. As his gaze rested on a high ceiling of white plaster and ancient pine beams, he reminded himself that he had no reason to feel intimidated. For all their dignity, the Wang dynasty had not been able to crush the Khara-Kitai when those people came into their land from Chin territory and built fortresses. If Jelme had not volunteered his army to burn them out, the Koryon king would still be a near prisoner in his own palace. At fifteen years old, Chagatai felt a vague smugness at the thought. He had all the pride and arrogance of a young warrior, yet in this case he knew it was justified. Jelme and his warriors had come into the east to see what armies might stand against them and view the ocean for the first time. They had found enemies in the Khara-Kitai and driven them out of Koryo like whipped dogs. Chagatai knew it was only just that the king pay a tribute, whether he had asked for help or not.

Sweating in the heavy air, Chagatai tortured himself with memory of the breeze off the sea in the south. The cool wind had been the only good thing about that blue vastness, in his opinion. Jelme had been fascinated by the Koryon ships, but the thought of wanting to travel on water baffled Chagatai. If it could not be ridden, he had no use for it. Even the memory of the royal barge swaying at anchor made his stomach clench.

A bell sounded out in the courtyard, the tone echoing through gardens where bees buzzed in hives around acacia blossoms. Chagatai pictured the Buddhist monks heaving on the log that struck the great bell and he straightened, once more aware of how he stood. The king would be on his way and his torment would come to an end. He could stand an itch a little longer: just the thought of relief made it seem bearable.

The bell boomed again and servants slid back screens, opening the hall to the scent of pines from the surrounding hills. Despite himself, Chagatai let out a sigh as the intense heat began to lessen. The crowd moved subtly as they strained to see the king and Chagatai used the distraction to dig two fingers into his armpit and scratch vigorously. He sensed Jelme’s gaze flicker to him and resumed his impassive expression as the king of the Koryo people entered at last.

None of them were tall, Chagatai thought, as he saw the diminutive monarch waft through a carved doorway. He supposed the man’s name was Wang, after his family, but who knew or cared how these wiry little people named each other? Chagatai looked instead at a pair of serving girls in the king’s retinue. With their delicate golden skin, they were far more interesting than the man they served. The young warrior stared as the women fussed around their master, arranging his robes as he seated himself.

The king did not seem aware of the watching Mongols as he waited for his attendants to finish. His eyes were almost the same dark yellow as Genghis’, though they lacked his father’s ability to inspire terror. Compared with the khan, the Koryon king was just a lamb.

The servants finished their tasks at last and the king’s gaze finally focused on the arban of ten warriors Jelme had brought. Chagatai wondered how the man could bear such thick cloth on a summer’s day.

When the king spoke, Chagatai could not understand a word. Like Jelme, he had to wait for the translation into the Chin language he had struggled to master. Even then, he could hardly catch the meaning and listened in growing frustration. He disliked foreign languages. Once a man knew the word for a horse, why use another? Obviously Chagatai understood that men from far lands might not know the right way of speaking, but he felt they owed it to themselves to learn and not continue their gibberish, as if all tongues were of equal value.

‘You have kept your promises,’ the translator said solemnly, interrupting Chagatai’s thoughts. ‘The Khara-Kitai fortresses have burned for many days and that foul people have gone from the high and beautiful land.’

Silence fell again and Chagatai shifted uncomfortably. The court of the Koryo seemed to delight in slowness. He recalled his experience of the drink they called ‘nok cha’. Jelme had frowned at the way Chagatai emptied his cup in a gulp and held it out for another. Apparently, the pale green liquid was too valuable to be drunk like water. As if one warrior should care how another ate or drank! Chagatai ate when he was hungry and often forgot to attend the elaborate meals of the court. He could not understand Jelme’s interest in pointless rituals, but he had not spoken his thoughts aloud. When he ruled the Mongol nation, he would not allow pretension, he vowed to himself. Food was not something to linger over, or prepare in a thousand flavours. It was no wonder that the Koryon people had come so close to being conquered. They would be required to speak one language and eat perhaps no more than two or three different dishes, prepared quickly and without fuss. It would leave more time for training with weapons and exercise to make the body strong.

Chagatai’s wandering thoughts stilled as Jelme spoke at last, apparently having weighed every word.

‘It is fortunate that the Khara-Kitai chose to attack my scouts. Our needs met in their destruction. I speak now for the great khan, whose warriors have saved your country from a terrible enemy. Where is the tribute promised by your ministers?’

As the translation droned, the king stiffened slightly in his seat. Chagatai wondered if the fool took some insult from the words. Perhaps he had forgotten the army camped outside the city. At a single command from Jelme, they would burn the polished beams around the king’s head. It was still a mystery to Chagatai why they had not. Surely Genghis had sent them out to hone their skills? Chagatai appreciated distantly that there was an art in negotiating that he had yet to learn. Jelme had tried to explain the need to deal with foreign powers, but Chagatai could not see it. A man was either an enemy or a friend. If he was an enemy, everything he owned could be taken. Chagatai smiled as he completed the thought. A khan needed no friends, only servants.