The office was then filled by a Pole called Mazeppa; he had been brought up as page to King John Casimir, and had got a little learning at his Court. On the discovery of an intrigue with the wife of a Polish nobleman, the latter had him tied, stark naked, to a wild horse, and set him free in that state. The horse, which had been brought from Ukrania, returned to its own country, carrying Mazeppa with him half dead from hunger and fatigue. Some of the peasants gave him relief, and he stayed a long time among them, and distinguished himself in several attempts against the Tartars. The superiority of his intelligence made him a person of consideration in the eyes of the Cossacks, and as his reputation daily increased the Czar was forced to make him Prince of Ukrania.
One day, as he was sitting at table with the Czar at Moscow, the Emperor proposed to him to drill the Cossacks and make them more independent. Mazeppa pointed out the situation of Ukrania and the nature of the people as insurmountable obstacles. The Czar, who was over-heated with wine, and had not always sufficient self-control, called him a traitor, and threatened to have him impaled. On his return into Ukrania Mazeppa planned a revolt. The Swedish army appearing shortly after on the frontier facilitated matters for him, and he resolved to gain independence, and to form for himself a powerful kingdom from Ukrania and the ruins of the Russian Empire. He was a man of great courage, of considerable enterprise, and most painstaking, though he was advanced in years.
He made a secret league with the King of Sweden, to hasten the Czar’s downfall and gain something himself out of it. He gave him a rendezvous near the river Desna; Mazeppa promised to meet him there with 30,000 men, ammunition and provisions, and all his treasure, which was immense. The Swedish army was therefore ordered to march towards that part of the country, to the great regret of the officers, who knew nothing of the King’s treaty with the Cossacks.
Charles sent orders to Levenhaupt to bring his troops and provisions with all haste to Ukrania, where he intended passing the winter, that, having subdued that country, he might conquer Russia the following spring; meanwhile he advanced towards the river Desna, which flows into the Borysthenes at Kiouw.
The obstacles they had hitherto encountered on their march were trifles to those they met on this new route; they had to cross a forest fifty leagues broad, which was full of marshes. General Lagercron, who led the van with 5,000 men and pioneers, led the army thirty leagues too far to the east. They had marched four days before the King discovered their mistake. They regained the right road with some difficulty, but almost all the artillery and wagons were stuck fast or sunk in the mud.
They then marched for twelve days in this painful and laborious fashion till they had eaten the little biscuit they had left, and so they arrived, spent with hunger and fatigue, on the banks of the Desna, where Mazeppa was to meet them. Instead of the Prince, however, they found a body of Russians advancing towards them on the other side of the river. The King was much astonished, and decided to cross the Desna and attack the enemy. The banks of this river were so steep that they were obliged to let the soldiers down by cords; then they crossed in their usual manner, some by swimming, some on hastily constructed rafts.
The band of Russians, which arrived at the same time, were only 8,000, so that their resistance was feeble, and this obstacle was also overcome.
Charles advanced further into this desolate country, uncertain of his route and of Mazeppa’s fidelity; at last the latter appeared, but rather as a fugitive than as a strong ally. The Russians had discovered and prevented his plan: they had fallen upon the Cossacks and cut them in pieces; his chief friends were taken red-handed, and thirty of them had been broken on the wheel. His towns were reduced to ashes, his treasures plundered, and the provisions he was preparing for the King of Sweden seized. He himself escaped with difficulty, accompanied by 6,000 men, and some horses laden with gold and silver. But he held out to the King the hope that he would be of some service from his knowledge of this unknown country, and by the affection of the natives, who, enraged with the Russians, came in troops to the camp, and brought provisions.
Charles hoped that at least General Levenhaupt would come to repair this ill fortune; he was to bring about 15,000 Swedes (of more use than 100,000 Cossacks), with stores and ammunition. He arrived at last, but almost in the same condition as Mazeppa. He had already passed the Borysthenes above Mohilou, and advanced about twenty leagues further on the road to Ukrania. He brought the King a convoy of 8,000 wagons, with the money he had raised in Lithuania and on march. On reaching Lesno, near the spot where the rivers Pronia and Sossa unite to flow into the Borysthenes far below, the Czar appeared at the head of 50,000 men.
The Swedish general, who had not quite 16,000, decided not to entrench. Their many victories had given the Swedes so much confidence that they never inquired as to the enemy’s numbers, but only their position. Levenhaupt marched against them on the 7th of October, 1708, in the afternoon. At the first attack they killed 15,000 Russians; the Czar’s army took panic and fled in all directions, and the Emperor of Russia thought he would be entirely defeated. He saw that the safety of his dominions depended upon the action of the day, and that he could be ruined if Levenhaupt joined the King of Sweden with a victorious army.