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27 June 1709 (Old Style)Reputable source · 2 sourcesWell documented

Russia crushes Sweden at the Battle of Poltava

Charles XII's invasion ends in catastrophe and Russia replaces Sweden as the dominant Baltic power

On the timeline · around 27 June 1709 (Old Style) · The Romanov EmpireThe Mongol Yoke and the Rise of MoscowThe Romanov EmpireRussia crushes Sweden at the Battle of Poltava16251650167517001725175017751800

Quick facts

Russian commander
Peter I "the Great"
Swedish commander
Charles XII
Date
27 June 1709 (Old Style)
War
Great Northern War, 1700-1721

What happened

As part of the Great Northern War, Sweden's King Charles XII invaded Russia in 1708 aiming to strike Moscow. His army, worn down by scorched-earth tactics and one of the coldest winters in centuries, had shrunk to roughly 20,000 men by spring 1709. Charles besieged the town of Poltava hoping to seize its Russian garrison and desperately needed supplies. Peter I arrived with a much larger force and, after learning the Swedes were low on gunpowder, crossed the Vorskla River to engage. On 27 June 1709, the two armies fought in open country; Charles was severely wounded but continued directing the battle from a stretcher, but within hours the Swedish army was broken.

Why it matters

Poltava ended Sweden's status as the dominant power in the Baltic region and marked Russia's entry onto the European stage as a major power for the first time. The formal peace, the Treaty of Nystad, was not signed until 1721, but Poltava had already decided the war's outcome and vindicated Peter's westernizing military reforms.

How we know

Peter's own military records and Swedish accounts of the campaign, including the retreat and the eventual capitulation of the remaining Swedish forces, corroborate the battle's course and outcome.

Sources

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