Under the finance minister Obaidallah b.
In the middle of the year 914 Egypt was invaded for the first time by a Fatimite force sent by the caliph al-Mahdi Obaidallah, now established at Kairawan.
Meanwhile Yazid, having been informed of the riotous behaviour of the Shiites in Kufa, sent Obaidallah, son of the famous Ziyad and governor of Basra, to restore order.
Using the same tactics as his father had used before, Obaidallah summoned the chiefs of the tribes and made them responsible for the conduct of their men.
On the 8th of Dhu'l-Hijja Hosain set out from Mecca with all his family, expecting to be received with enthusiasm by the citizens of Kuf a, but on his arrival at Kerbela west of the Euphrates, he was confronted by an army sent by Obaidallah under the command of Omar, son of the famous Sa`d b.
Sa`d and his officers, Obaidallah and even Yazid came to be regarded as murderers, and their names have ever since been held accursed by all Shiites.
Obaidallah sent the head of Hosain to Damascus, together with the women and children and Ali b.
The amir of the Kalb, Ibn Balidal, persuaded probably by Obaidallah b.
They were routed at Ras `Ain, but Obaidallah had.
An army despatched against Obaidallah under Ibrahim routed the Syrians near Mosul (battle of Khazir); Obaidallah and Hosain b.
Ibn Zobair, however, was occupied at Mecca with the rebuilding of the Ka`ba, and Mus`ab was harassed not only by the Kharijites, but also by a noble freebooter, Obaidallah b.
When, in 697, Hajjaj gave the government of Khorasan to Mohallab, he committed that of Sijistan (Seistan) to Obaidallah b.
Obaidallah governor of Medina, with orders to lay hands on Mahommed and his brother Ibrahim, who, warned betimes, took refuge in flight.
He was a feeble, pleasureloving monarch, but Mohtadi had regained for the Caliphate some authority, which was exercised by Obaidallah b.