Sloboda Ukraine

State · 1670–1768 CE · at its largest around 1670 CE

A frontier region in what is now northeastern Ukraine, settled by Cossacks and peasants under Muscovite rule and organised into Cossack regiments until Catherine II abolished them.

On its lands while it lasted

Battle of Poltava (1709 CE): Peter the Great's Russian army crushed Charles XII's Swedish army at Poltava in Ukraine in 1709, ending Sweden's status as a great power.