Poltava, Battle of. (Map: Battle of Poltava.)The turning point in the Great Northern War (1700–21) between Sweden and Russia. When Hetman Ivan Mazepa learned that Tsar Peter I intended to abolish the autonomy of the Hetman state, he began secret negotiations with Charles XII of Sweden to ensure that Ukraine would not be annexed by Poland in the event of a Swedish victory. After the main Swedish army entered Ukraine, Mazepa openly sided with Charles against Peter.
Because of the harsh winter of 1708–9 and a series of military defeats the situation of the Swedish army in Ukraine became precarious. The assistance Charles XII expected from Turkey and the Crimean Khanate did not materialize, and the Polish army of King Stanislaus I Leszczynski and a Swedish corps were forced to remain in Poland to fight the supporters of Frederick Augustus II. Charles's only success at that time was enlisting the support of Otaman Kost Hordiienko and his army of 8,000 Zaporozhian Cossacks in April 1709. Semiencircled by the Russians, Charles chose not to retreat to Volhynia (as his generals counseled) but to advance to the Vorskla River and thence on to Moscow via Kharkiv and Kursk. Several fortified cities on the way encumbered Charles's advance. One such city was Poltava, situated at the intersection of important routes to Southern Ukraine, Right-Bank Ukraine, and Slobidska Ukraine and the Don region. It was defended by a garrison of 4,300 Russian soldiers and 2,600 Ukrainian volunteers commanded by Gen A. Kelin.
In early May 1709, on Ivan Mazepa's advice, Charles XII decided to capture Poltava. Having failed to take it by storm, he besieged and bombarded the hungry city. Peter I arrived to relieve Poltava and decided his army of 42,500 soldiers and 102 cannons would attack the Swedes on 10 July. Cossack forces loyal to Peter under the command of Hetman Ivan Skoropadsky cut off possible Swedish retreat to the Dnieper River between Pereiaslav and Kremenchuk. Charles had 31,000 men but only 4 cannons; 6,000 of his soldiers were engaged in maintaining the siege or guarding the Vorskla River rear. Mazepa's small force was held in reserve to protect the Swedish western flank and ensure that A. Kelin would not attack from the fortress.
When Charles XII learned, during the night of 7 July, that a Kalmyk army of 40,000 would arrive to reinforce the Russians in two days, he decided to act first and destroy the Russian encampment in a lightning blow. At 5 AM on 8 July the Swedish infantry advanced on Russian positions but was repelled by cavalry. The Swedish cavalry successfully engaged its counterpart but was forced to retreat under heavy fire. The Swedish infantry attacked once more and captured two Russian redoubts, but failed to hold them. As the Swedes attempted to bypass the redoubts, Prince Aleksandr Menshikov's troops encircled them and inflicted heavy casualties. Fifty to seventy meters from Russian positions the Swedes met a hail of deadly artillery fire. Panic ensued in their ranks, but they managed to retreat into the nearby Budyshcha forest, where Charles was able, with considerable difficulty, to restore order.
At around 9 AM, having regrouped their forces, both Peter I and Charles XII ordered their troops to advance. Intense Russian artillery fire again created chaos in the Swedish ranks, their center buckled, and a disorderly retreat ensued to the Swedish encampment, which by then had been captured by Russian forces. By 11 AM the Swedes had been routed. Over 9,300 died, and nearly 2,900 were taken prisoner, including Field Marshal C.-G. Rehnskjold and the first minister, C. Piper. The Russian army suffered 1,345 dead and 3,290 wounded. Swedish units that were not captured were led by Gen A.L. Lewenhaupt along the Vorskla River to Perevolochna, whence Charles, Ivan Mazepa, and Kost Hordiienko and a contingent of 3,000 Swedes and Cossacks crossed the Dnieper River and fled into Turkish-occupied territory. A.L. Lewenhaupt's army of 16,000 was forced to capitulate and surrender to Aleksandr Menshikov. According to the fifth provision of the capitulation agreement Cossacks under Swedish command were handed over to the Russians. Most of them were executed on the spot, and the rest were exiled to Siberia.
The Battle of Poltava resulted in Russian military rule in the Hetman state and increasing curtailment of its autonomy. The Museum of the History of the Battle of Poltava was opened at the battle site in 1950.