Linked from
The 14 pages that link to Battle of Poltava, each with the reason it gives.
Cossack HetmanateRelated: The defeat destroyed Mazepa’s bid to escape Russian control.
Treaty of NystadRelated: The defeat weakened Sweden and shifted the war decisively toward Russia.
Augustus II the StrongRelated: The Swedish defeat helped Augustus return to the Polish throne.
Poltava OblastRelated: The battle made Poltava a landmark in European and Ukrainian history.