For most of the participants in the khuriltai, Europe was a great unknown. Subodei was the only surviving commander who had been there, and he had originally probed it with only a small force. His discovery of Europe happened more than a decade earlier, in 1221, during Genghis Khan’s invasion of central Asia, when Subodei and Jebe had circled the Caspian in pursuit of the Khwarizm sultan. After the sultan’s death, they asked and received permission to continue to see what lay to the north. There they discovered the small Christian kingdom of Georgia, ruled by Giorgi III the Brilliant.
Jebe led the probe of their defenses. After centuries of warfare with the Muslims around it, Georgia boasted a highly skilled and professional army, and operating on their home territory, the defenders moved out to meet the attacking Mongols as they had met numerous Turkic and Muslim armies before them. Jebe’s Mongols charged the Georgians, fired a few volleys, and then turned to flee in what appeared to the Georgians to be a panicked rout; but, of course, it was no more than the Dog Fight strategy of the feigned retreat. The overconfident Georgian forces broke ranks and began to eagerly chase the Mongols, who barely managed to stay ahead of their pursuers. The Georgian horses gradually began to tire under their heavy loads and the strain of the long pursuit; they began to thin out as the weaker ones fell farther behind.
Then, suddenly, with the Georgian forces spread out and beginning to tire, Jebe’s retreating warriors led them straight into the ranks of the other Mongol regiment waiting under Subodei’s command. While Subodei’s men began to pick off the Georgians, Jebe’s soldiers mounted fresh horses and struck out to rejoin the fight. Within hours, the Mongols had completely destroyed the Georgian army and the small nation’s aristocracy. Subodei made the country a vassal state, the first in Europe, and it proved to be one of the most loyal and supportive Mongol vassals in the generations ahead.
With this test complete, Subodei and Jebe set out down the mountains to explore the plains of eastern Europe and see what the rest of these unknown people were like on the battlefield. Systematically but persistently, the Mongols probed the area. With the usual emphasis on reconnaissance and information gathering, they determined the number of people, the location of cities, the political divisions, and the rivalries among them. The Mongols found some Turkic tribes, known as the Kipchak, living on the plains between the northern shores of the Black and Caspian Seas. The Kipchak practiced a herding lifestyle very familiar to the Mongols. Playing on their similarities as fellow dwellers within felt walls and speaking related languages, the Mongols learned much from them and enticed some Kipchak to join them as allies. The real object of Subodei’s interest was in the agricultural lands farther north and west. The area contained many cities, and although all shared the Orthodox religion and the Russian language, rival and ambitious lords ruled them. Subodei moved his forces toward them to see how they would respond. He reached the banks of the Dnieper River, north of the Black Sea, at the end of April 1223.
The Christian cities of the plain managed to unite enough against the heathen invaders to send out their armies. Hastily assembled troops set out from all the small kingdoms and city-states of the area—Smolensk, Galich, Chernigov, Kiev, Volhynia, Kursk, Suzdal, and some of the Kipchak. Three of the armies—from Galich, Chernigov, and Kiev—came under the command of princes, all of whom were named Mstislav. The most impressive of the three Mstislavs was Prince Mstislav Romanovitch of Kiev, the largest and richest of all the cities, who arrived with the most impressive army, including his two sons-in-law. As the Russian armies gradually trickled in, the Mongols sent an envoy of ten ambassadors to negotiate a surrender or alliance. The Russians haughtily executed them all without any awareness of what a serious breach of Mongol diplomatic etiquette they had committed and what a high price their princes, and all Russians, would soon pay for their crime.
The Mongols began the confrontation with a small skirmish, after which they immediately began to fall back toward the east, from whence they had come, as though they might have been afraid to fight such a large and powerful foe. The Russian troops and some of their Kipchak allies gleefully followed them, but day after day the Mongols remained a little beyond the reach of the pursing Russians. While some of the regiments had not yet arrived to join the pursuit, the slower regiments fell behind, and the faster ones raced on nipping at the heels of the fleeing Mongols. The Russians feared that the Mongols might escape and thereby deprive the Russians of the large number of horses and other booty they carried from their earlier raids across Persia, Georgia, and Azerbaijan. In the competition for glory and loot, the Russian princes began pushing their soldiers on to get the glory of being the first to attack the Mongols; but in a crucial mistake, they made no plans for an organized retreat, regrouping, or withdrawal. After nearly two weeks of chase, the vanguard of the Russian army finally caught up with the Mongols on the Kalka River, which empties into the Sea of Azov, and here at last they would force the invaders to fight, at the place Jebe and Subodei had selected as most advantageous to the Mongols. Without pausing to allow their men to recover from the long forced march, and in fear that the Mongols might escape once again, the confident Russian princes drew up the battle lines for attack.
The later chronicles varied greatly on the number of Russian soldiers present, but somewhere between forty and eighty thousand men fought on the Russian side; the Russians fielded at least twice as many soldiers as the Mongols. But the Russian soldiers had been recruited mostly from the grainfields and small villages of the countryside. They were peasants who, when healthy and properly nourished, were quite strong and experienced in episodic campaigns, but they could scarcely be considered a professional army, particularly at the end of winter when they were poorly nourished. Most of them had more expertise in swinging a scythe to cut hay or cracking a whip to spur on an ox than using the weapons of war. Yet assured of easy victory by their aristocratic officers, the peasants lined up dutifully in military ranks behind their shields. Each man carried whatever weapon he had found or adapted from his farm tools—a makeshift sword, spear, mace, or club. A smaller number of better-trained archers stood nearby, and the elite officers proudly perched atop their steeds in the rear behind their infantry.
The Russian soldiers braced themselves, standing solidly shoulder to shoulder, unsure what kind of attack would come, but they remained determined not to break ranks. But the attack seemed not to come. Instead of attacking, the Mongols starting singing and beating their drums, and then, just as suddenly, the Mongol rank fell into an eerie but absolute quiet. Since it was a clear spring day without too much dust, the Mongols had chosen a Silent Attack to be controlled and coordinated by the waving of flags, at which signal the mounted Mongol archers raced silently forward toward the Russian infantry lines. The pounding of their hoofs on the earth reverberated across the lines and into the legs of the nervous soldiers waiting for the brunt of their charge. But the opposing sides failed to clash. The Mongol horsemen halted just beyond reach of the Slav’s hand weapons, and from there, the Mongols fired their arrows straight into the Russian infantry ranks. All around them, the Russian soldiers saw their comrades falling in pools of blood, yet they had no one within reach to counterattack. They had no one with whom to have a sword fight. No one at whom to throw a spear or chase with a club. All they had was a barrage of arrows, and the Mongols had purposefully made the arrows so that they could not be nocked onto their adversaries’ bowstrings. In their angry frustration, all the Russian soldiers could do was break the fallen arrows to make sure that the Mongols could not retrieve them to use again.