Al-Muazzam Isa vs Uthman

Al-Muazzam Isa, as Ayyubid ruler of Damascus, participated in the defense against the Fifth Crusade. The Crusaders besieged Damietta in the Nile Delta. Al-Muazzam Isa's forces were unable to prevent the city's fall in 1219, leading to a temporary Crusader occupation.

Al-Muazzam Isa, alongside his brother Sultan Al-Kamil of Egypt, negotiated the end of the Fifth Crusade. The treaty restored Damietta to the Ayyubids in exchange for a truce and the Crusaders' withdrawal from Egypt. This secured Ayyubid control over the region.

Al-Muazzam Isa engaged in a power struggle with his brother Sultan Al-Kamil of Egypt. He allied with the Khwarezmian prince Jalal al-Din against Al-Kamil. This internal Ayyubid conflict weakened the dynasty and allowed Crusader states to regain territory.

Al-Muazzam Isa died in Damascus, likely from natural causes. His death ended his rivalry with Al-Kamil and allowed the Egyptian sultan to consolidate Ayyubid power. His son An-Nasir Dawud succeeded him but was later deposed by Al-Kamil.

Uthman ibn Affan became the third caliph after Umar's assassination. His twelve-year reign saw continued expansion but also growing internal dissent, culminating in his assassination. He is known for standardizing the Quranic text.

Under Uthman, Muslim forces conquered Armenia and expanded into North Africa, capturing Tripoli and establishing control over the region. These campaigns extended the caliphate's reach and brought new territories under Islamic rule.

Uthman ordered the compilation of a standard written version of the Quran, based on the codex of Abu Bakr. He sent copies to major cities and ordered the destruction of variant texts, ensuring uniformity of the Islamic scripture.

Rebels from Egypt and other provinces besieged Uthman's house in Medina, demanding reforms. After weeks of siege, they broke in and assassinated him while he was reading the Quran. His death sparked the First Fitna (civil war) among Muslims.