Bashmurian revolt

Bashmurian revolt (ثورة البشموريين) (also Peshmurian revolt) was the revolt of the Coptic Christians living in Bashmur in the northern Nile Delta against the Abbasids, which occurred around 830. The revolt (and others previous) were attributed to oppressive taxation.

The rebels expelled the state workers and raised the banner of rebellion refusing to pay tribute (special tax on non-Muslims called the jizya). Caliph Al-Ma'mun, who was visiting the province, put down the rebellion, arresting and killing large numbers of Copts and their dependants. According to historian Ira M. Lapidus, the crushing of the rebellion was followed by "despair" among the Copts and began a second wave of major persecution, Which hadn't been seen since the entry of Islam to Egypt in 642.