Yedisan, the western part of the Wild Fields that sprawl to the north of the Black Sea between the Dniester and Dnieper rivers, is east of Budjak and Bessarabia, south of Podolia and Zaporizhia, and west of Taurida.

The region is named for the Yedisan sept of the Nogai Horde As "Yedisan" is Turkic for "Seven Titles", doubtless the sept was made up of seven subgroups.

Yedisan is also sometimes referred to as Ochakov Tartary after Ochakov (Ochakiv), the main fortress of the region.

In the early medieval period, Yedisan was home to Ulichs, Pechenegs, and later Cumans (Polovtsians).

Following the Mongol invasions of the thirteenth century it was under control of the Khanate of the Golden Horde.

In the fifteenth century it had fallen to the Grand Duchy of Lithuania (when it was known as Dykra), and in 1526 falls to the Ottoman Empire’s vassal state, the Crimean Khanate.