Between 902 and 909, the foundation of the Fatimid state was realized under the leadership of da'i (missionary) Abu Abdallah, whose conquest of Aghlabid Ifriqiya with the help of Kutama forces paved the way for the establishment of the Caliphate.

[21] The Fatimid dynasty came to power as the leaders of Isma'ilism, a revolutionary Shi'a movement "which was at the same time political and religious, philosophical and social," and which originally proclaimed nothing less than the arrival of an Islamic messiah.

[31] While the awaited mahdī Muhammad ibn Isma'il remained hidden, however, he would need to be represented by agents, who would gather the faithful, spread the word (daʿwa, "invitation, calling"), and prepare his return.

[34][35] In the last third of the ninth century, the Isma'ili daʿwa spread widely, profiting from the collapse of Abbasid power in the Anarchy at Samarra and the subsequent Zanj Revolt, as well as from dissatisfaction among Twelver adherents with the political quietism of their leadership and the recent disappearance of the twelfth imam.

[36] Missionaries (dā'īs) such as Hamdan Qarmat and Ibn Hawshab spread the network of agents to the area round Kufa in the late 870s, and from there to Yemen (882) and thence India (884), Bahrayn (899), Persia, and the Maghreb (893).

[41][42] Abdallah's claim caused a rift in the Isma'ili movement, as Hamdan Qarmat and other leaders denounced this change and held onto the original doctrine, becoming known as the "Qarmatians", while other communities remained loyal to Salamiya.

[21][43][44] Prior to the Fatimid rise to power, a large part of the Maghreb including Ifriqiya was under the control of the Aghlabids, an Arab dynasty who ruled nominally on behalf the Abbasids but were de facto independent.

The local population were mostly adherents of Maliki Sunnism and various Kharijite sects such as Ibadism,[21] so that the real power base of Fatimids in Ifriqiya was quite narrow, resting on the Kutama soldiery, later extended by the Sanhaja Berber tribes as well.

[65] The new capital was removed from the Sunni stronghold of Kairouan, allowing for the establishment of a secure base for the Caliph and his Kutama forces without raising further tensions with the local population.

He was unable, however, to dislodge the Umayyad garrisons in Sala, Sebta (present-day Ceuta) and Tangier, and this marked the only time that the Fatimid army was present at the Strait of Gibraltar.

Al-Qa'im died during the siege, but this was kept secret by his son and successor, Isma'il, until he had defeated Abu Yazid; he then announced his father's death and proclaimed himself imam and caliph as al-Mansur.

[82][83] The name al-Qāhirah (Arabic: القاهرة), meaning "the Vanquisher" or "the Conqueror", referenced the planet Mars, "The Subduer",[84] rising in the sky at the time when the construction of the city started.

[86] Ja'far's next step was to attack the Byzantines, who had captured Antioch and subjugated Aleppo in 969 (around the same time as Jawhar was arriving in Egypt), but he was forced to call off the advance in order to face a new threat from the east.

Ibn Killis was able to subjugate most of Palestine and southern Syria (the former Ikhshidid territories) by paying off the Qarmatis with an annual tribute and making alliances with local tribes and dynasties, such as the Jarrahids and the Banu Kilab.

[106] Following another failed attempt by a Kutama general, Salman, to take Damascus, the Turkish ghulām Bultakīn finally succeeded in occupying the city for the Fatimids in 983, demonstrating the value of this new force.

[106] In the short term the Kutama warriors remained the most important troops of the Caliph, but resentment and rivalry eventually grew between the different ethnic components of the army.

Hasan ibn Ammar, the leader of the Kalbid clan in Egypt, a military veteran, and one of the last remaining members of al-Mu'izz's old guard, initially became regent, but he was soon forced to flee by Barjawan, the eunuch and tutor of the young al-Hakim, who took power in his stead.

[128] In 1012 the leaders of the Arab Tayyi tribe occupied Ramla and proclaimed the sharif of Mecca, al-Ḥasan ibn Ja'far, as the Sunni anti-caliph, but the latter's death in 1013 led to their surrender.

This lasted until 1017, when the Fatimid Armenian general Fatāk finally occupied Aleppo at the invitation of a local commander who had expelled the Hamdanid ghulām ruler Mansur ibn Lu'lu'.

[133][15] After al-Hakim's death his two designated heirs were killed, putting an end to his succession scheme, and his sister Sitt al-Mulk arranged to have his 15-year-old son Ali installed on the throne as al-Zahir.

[142] Declining resources accelerated the problems among the different ethnic factions, and outright civil war began, primarily between the Turks under Nasir al-Dawla ibn Hamdan, a scion of the Hamdanids of Aleppo, and Black African troops, while the Berbers shifted alliance between the two sides.

[165] This defeat established the Kingdom of Jerusalem as a new regional rival and although many crusaders returned to Europe, having fulfilled their vows, the remaining forces, often aided by the Italian maritime republics, overran much of the coastal Levant, with Tripoli, Beirut, and Sidon falling to them between 1109 and 1110.

[171][15] Kutayfāt attempted to depose the Fatimid dynasty by imprisoning Abd al-Majid and by declaring himself to be the representative of Muhammad al-Muntazar, the "hidden" Imam awaited by Twelver Shi'as.

The internal disorder of the Caliphate attracted the attention and meddling of the Sunni Zengid ruler Nūr ad-Dīn, who was now in control of Damascus and a large part of Syria, and of the King of Jerusalem, Amalric I.

Salah ad-Din was openly pro-Sunni and suppressed the Shi'a call to prayer, ended the Isma'ili doctrinal lectures (the majālis al-ḥikma), and installed Sunni judges.

This shift was likely due to the Jerusalem ga'on's own loss of influence and to the Jewish community's engagement with the centralizing politics that Badr al-Jamali pursued around this time (which had already resulted in the transfer of the Coptic Patriarchate to Fustat).

This ethnic-based army system, along with the partial slave status of many of the imported ethnic fighters, would remain fundamentally unchanged in Egypt for many centuries after the fall of the Fatimid Caliphate.

In the mid-10th century, the Byzantine Empire was ruled by Nikephoros II Phokas, who had destroyed the Muslim Emirate of Crete in 961 and conquered Tartus, Al-Masaisah, 'Ain Zarbah, among other areas, gaining complete control of Iraq and the Syrian borders, and earning the sobriquet "The Pale Death of the Saracens".

[218] When al-Manṣūr's successor, al-Mu'izz, moved the caliphate to Cairo he left his deputy, Buluggin ibn Ziri, as regent of Ifriqiya, marking the beginning of the city's Zirid period.

List of important figures: After Al-Mustansir Billah, his sons Nizar and Al-Musta'li both claimed the right to rule, leading to a split into the Nizari and Musta'li factions respectively.