Malik-Shah I vs Sejo of Joseon

Malik-Shah I, with his vizier Nizam al-Mulk, established a network of madrasas (Islamic schools) across the empire, the most famous being in Baghdad. These institutions standardized Sunni education and promoted Shafi'i jurisprudence, influencing Islamic scholarship for centuries.

Malik-Shah I's forces, commanded by his general Alp Arslan, defeated the Byzantine army at Manzikert in eastern Anatolia. The victory led to the capture of Emperor Romanos IV and opened Anatolia to Turkish settlement, fundamentally altering the region's demographic and political landscape.

Under Malik-Shah I, the Seljuk Empire reached its greatest territorial extent, stretching from the Mediterranean to Central Asia. He conquered Syria, Palestine, and parts of the Arabian Peninsula, establishing Seljuk hegemony over the Middle East.

Malik-Shah I commissioned a group of astronomers, including Omar Khayyam, to reform the Persian calendar. The resulting Jalali calendar was more accurate than the Gregorian calendar, with a precise calculation of the solar year, and was used in Persia for centuries.

Malik-Shah I's vizier Nizam al-Mulk was assassinated by a member of the Assassins (Nizari Ismailis). This event destabilized the Seljuk court and contributed to the decline of the empire after Malik-Shah's own death later that year.

Grand Prince Suyang (later Sejo) staged a coup, forcing his nephew King Danjong to abdicate. Sejo assumed the throne, initiating a reign marked by consolidation of power and elimination of rivals.

Sejo discovered a plot by six loyalist ministers to restore Danjong. He had them executed, along with their families, in a brutal purge that eliminated opposition to his rule.

Sejo ordered the murder of his deposed nephew Danjong, who was then 16. This act removed the last legitimate claimant to the throne and secured Sejo's dynasty.

Sejo led military campaigns against Jurchen tribes in the northern border regions. These campaigns secured Joseon's northern frontier and expanded territory.

Sejo initiated the compilation of the Gyeongguk Daejeon, a comprehensive legal code that would later be completed under Seongjong. This code systematized Joseon's government and laws.