There were occasionally riots due to scarcity of corn (notably in Mexico itself in 1692).
The notion that the Arab invaders were welcomed and assisted by the Copts, driven to desperation by the persecution of Cyrus, appears to be refuted by the fact that the invaders treated both Copts and Romans with the same ruthlessness; but the dissensions which prevailed in the Christian communities, leading to riots and even civil war in Alexandria and elsewhere, probably weakened resistance to the common enemy.
After a brief period of prosperity, the Arabi rising, the riots at Alexandria, and the events generally which led to the British occupation of Egypt in 1882, followed by the losses incurred in the Sudan in the effort to prevent it falling into the hands of the Mahdi, brought Egypt once more to the verge of financial disaster.
Czech manifestoes were confiscated, and meetings stopped at the slightest appearance of disorder; and the riots were punished by quartering soldiers upon the inhabitants.
Serious riots broke out in some of the towns of Istria when, for the first time, Illyrian was used for this purpose as well as Italian.