Cossack Hetman Ivan Mazepa (1639–1709) defects to …

Years: 1708 - 1719
Cossack Hetman Ivan Mazepa (1639–1709) defects to Sweden against Russia in 1709 in the Great Northern War (1700–1721).

Eventually Tsar Peter the Great recognizes that to consolidate and modernize Russia's political and economic power it is necessary to do away with the hetmanate and Ukrainian and Cossack aspirations to autonomy.

Mazepa dies in exile after fleeing from the Battle of Poltava (1709), where the Swedes and their Cossack allies suffer a catastrophic defeat.

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