In the early Middle Ages, it was inhabited by Copts (Egyptians) and was the scene of a series of revolts against Arab occupation in the 8th and 9th centuries.
Perhaps from the mid-eighth to the mid-ninth century, Bashmur encompassed the entire marsh region northeast of Fuwwah (Coptic: ⲃⲟⲩⲁ) extending as far to the east as just north of Dekernes.
In the 14th century, Abu al-Fida located Bashmur in the northeast of the Delta between Damietta and Ashmun El Rumman.
[4] The name Bashmur survives in this region as the name of a Nile canal that breaks off about 4.5 miles (7 km) east of Mansoura, Egypt by El Salamun and runs through the area between the Damietta arm of the Nile and Dekernes before emptying into the El Sirw canal some 3.5 miles (5.5 km) south of Dakahlia.
The economy of the region also favoured the Bashmurians, who relied on limited agriculture, fishing and hunting birds for food.