Zaporizhian Sich or Zaporozhian Sech (Ukrainian: Запорізька Січ, Zaporiz'ka Sich) was the center of the Cossacks of Zaporizhzhia. Initially it was a fortified military camp (Sich) created at the Isle of Khortitsa (Mala Khortitsa, Khortitsa Minor) around 1555. The term Sich comes from the verb "to cut" and denotes the way of fortification: by cut forest.
The period before it was disbanded in 1709 is sometimes referred to as the Old Sich (Old Sech). From 1734 to 1775 the New Sich (New Sech) existed, disbanded after the failure of the Pugachev Uprising.