Zaporizhzhia (region) in the context of "Right-bank Ukraine"

Yedisan (also Jedisan or Edisan; Ukrainian: Єдисан, romanized: Yedysan, Romanian: Edisan, Ottoman Turkish: یدیصان, Turkish: Yedisan, Russian: Едисан, romanized: Yedisan, Dobrujan Tatar: Ğedísan) was a conditional name for Özi [Paşa] Sancağı (Ochakiv Sanjak) of Silistra Eyalet, a territory located in today's Southern Ukraine between the Dniester and the Southern Bug (Boh). It was placed by the Ottomans under the control of the Nogai Horde in the 17th and 18th centuries and was named after one of the Nogai Hordes. In the Russian Empire, it was referred to as Ochakov Oblast, while the Ottoman Turks called it simply Özü after the city of Ochakiv which served as its administrative center. Another name used was Western Nogai.

Geographically, it was the western part of the so-called Wild Fields that sprawled to the north of the Black Sea between the Dniester and Dnieper rivers. It lies east of Budjak and Bessarabia, south of Podolia and Zaporizhzhia, and west of Taurida. Since the mid-20th century, the territory has been divided between southwestern Ukraine and southeastern Moldova (southern Transnistria).

Novorossiya is a historical name, used during the era of the Russian Empire for an administrative area that would later become the southern mainland of Ukraine: the region immediately north of the Black Sea and Crimea. The name Novorossiya, which means "New Russia", entered official usage in 1764, after the Russian Empire conquered the Crimean Khanate, and annexed its territories, when Novorossiya Governorate (or Province) was founded. Official usage of the name ceased after 1917, when the entire area (minus Crimea) was annexed by the Ukrainian People's Republic, precursor of the Ukrainian SSR.

Novorossiya Governorate was formed in 1764 from military frontier regions and parts of the southern Hetmanate, in anticipation of a war with the Ottoman Empire. It was further expanded by the annexation of the Zaporozhian Sich in 1775. At various times, Novorossiya encompassed the modern Ukraine's regions of the Black Sea littoral (Prychornomoria), Zaporizhzhia, Tavria, the Azov Sea littoral (Pryazovia), the Tatar region of Crimea, the area around the Kuban River, and the Circassian lands.

The Zaporozhian Host (Ukrainian: Військо Запорозьке, romanized: Viis'ko Zaporoz'ke), or Zaporozhian Sich (Ukrainian: Запорозька Січ, romanized: Zaporoz'ka Sich) is a term for a military force inhabiting or originating from Zaporizhzhia, the territory in what is Southern and Central Ukraine today, beyond the rapids of the Dnieper River, from the 15th to the 18th centuries.