The Nilotic people of South Sudan—the Acholi, Anyuak, Bari, Dinka, Nuer, Shilluk, Kaligi (Arabic Feroghe), and others—first entered South Sudan sometime before the 10th century, coinciding with the fall of medieval Nubia. From the 15th to the 19th century, tribal migrations, largely from the area of Bahr el Ghazal, brought the Anyuak, Dinka, Nuer and Shilluk to their modern locations in Bahr El Ghazal and the Upper Nile Region, while the Acholi and Bari settled in Equatoria. The Zande, Mundu, Avukaya and Baka, who entered South Sudan in the 16th century, established the region's largest state of Equatoria Region.