Al-Ma’mun’s Rule 📜

Initially, Al-Ma’mun ruled the Caliphate from his old base at Merv. To widen his support after the civil war, he fostered a new alliance with the Alids, a powerful family descended from Ali, the fourth Caliph and son-in-law of the Prophet Muhammad.

Al-Ma’mun’s Reforms and Religious Policies 🕌

To signify this alliance, Al-Ma’mun’s court began to wear green, a color associated with the Alids. He even married two of his daughters into the Alid family and made Alid Imam Ali al-Rida his heir apparent. However, these policies sparked hostility back in Iraq, leading to major revolts in Baghdad. After six years, the Caliph moved the capital back to Baghdad to restore order and abandoned his Alid alliance.

Al-Ma’mun also attempted to impose a new religious doctrine on the Caliphate. He invited distinguished scholars to Baghdad to discuss theological issues such as the deeds of the companions of the Prophet (the Hadiths) and the nature of the Quran. His pronouncement that the Quran was created by God, rather than being co-eternal with God, encountered bitter resistance, leading to 18 years of religious persecution, known as the Mihna or Inquisition, which saw dissenting scholars imprisoned or even executed.

Al-Mutasim and the Military Revolution 🛡️

In 833, Al-Ma’mun was succeeded by his brother, who took the title Al-Mutasim. Unlike his predecessor, Al-Mutasim was less interested in theological debate and more focused on the clash of arms.

The Mamluks were seized from their villages as boys, given intensive military training alongside an Islamic education, and emerged as formidable cavalrymen and skilled mounted archers. They eventually formed an elite corps within the Abbasid army, personally loyal to the Caliph and used to intimidate political rivals.

Samarra: A New Military City 🏙️

Al-Mutasim’s reliance on slave soldiers to shore up his power sowed the seeds of future turmoil. To ease tensions with the old nobility:

Despite these efforts, tensions continued to rise. In 861, the Caliph was assassinated by his own bodyguards, leading to a decade of anarchy where four puppet Caliphs were violently overthrown by the Turkish military elite.

Restoring Order: Al-Mu’tamid’s Resurgence 🌟

Order was eventually restored with the accession of Caliph Al-Mu’tamid in 870. However, the anarchy had irreparably damaged the Caliph’s authority.

Regional Revolts and the Fragmentation of the Caliphate 🌍

Before the Abbasids came to power, the vast Caliphate had struggled to maintain control of its many regions. Under the Abbasids, multiple major uprisings broke out as local governors and warlords staked their claims to rule:

Despite these revolts, there were some successes. Caliph al-Mutadid engineered a brief Abbasid resurgence through military campaigning and shrewd diplomacy.

The Decline of Abbasid Authority 📉

During the reign of Al-Mutadid’s son, Al-Muqtadir, Tulunid Egypt was reabsorbed into the Abbasid Caliphate. However, elsewhere the news was dire:

Increasingly, the Abbasid Caliph was said to reign but not rule, often under the thumb of his vizier. By the 930s, the Caliph had lost control of both the civilian administration and army command, which was handed over to a new official, the Amir al-Umara.

The Buiyids and the Shī‘a Century 🌙

In 945, the Buiyids, Shiite warlords from Northwestern Persia, seized control of Baghdad. Their triumph marked the beginning of the so-called Shiite Century, where Shiite dynasties ruled twin caliphates and dominated much of the Muslim world.

The Seljuk Turks: A New Sunni Power 🏇

The Seljuk Turks were pastoralists and fierce warriors from the Central Asian steppe who became champions of Sunni Islam.

Under the Seljuks, Abbasid Caliphs continued to reign as spiritual leaders and figureheads. However, the 12th century saw the fracturing of the Great Seljuk Empire due to disputed successions and local governors making their bids for power.

The Rise of the Assassins 🗡️

Faced with powerful enemies but without an army of their own, a new Ismaili military order, known as the Assassins or Hashashin, turned to subterfuge and assassination.

The Reclamation of Independence 🛡️

Amidst the fracturing of Seljuk power, in 1136, Abbasid Caliph Al-Muqtafi raised his own army to reassert Abbasid independence. For the first time in nearly two centuries, the Abbasids took control of Baghdad:

The Mongol Destruction ⛩️

In the 13th century, a new force from the East—the Mongols—tore through the Islamic world. They scattered armies and destroyed every city that did not submit to them:

The Mongols destroyed Baghdad’s libraries, and the death toll is unknown but was in the many thousands. The last Caliph of Baghdad, Al-Mustasim, was executed, and never again would the Abbasids hold meaningful political power.

The Abbasid Legacy 🌟

Although the Abbasid line continued under the Mamluks in Egypt, the successors in Cairo were merely ceremonial figures. The last Caliph, Al-Mutawakkil III, surrendered to the Ottoman Empire in 1517 and was taken to Constantinople as a prisoner.

Despite this humiliating fate, the Abbasids ruled one of history’s greatest empires for five centuries. They dominated the Middle East, defeated the Byzantines in the west and Chinese in the east, and oversaw an era of Islamic flourishing in scholarship, culture, technology, and trade. For centuries to come, Islamic leaders would assert their legitimacy by claiming descent from this one towering dynasty—the Abbasids.