Hasan-i Sabbah vs Taejong of Joseon

Hasan-i Sabbah and his followers seized the Alamut fortress in the Alborz mountains of northern Iran. This became the headquarters of the Nizari Ismaili state and the base from which he led a decentralized resistance against the Seljuk Empire.

Following the capture of Alamut, Hasan-i Sabbah established a network of mountain fortresses in Persia and Syria, creating a Nizari Ismaili state. This state operated as a decentralized theocracy, using strategic assassinations to counter Seljuk power.

The Seljuk vizier Nizam al-Mulk was assassinated by a Nizari Ismaili agent near Nahavand. This event demonstrated the reach of Hasan-i Sabbah's network and destabilized the Seljuk administration, contributing to the decline of Seljuk central authority.

After the death of the Fatimid caliph al-Mustansir, Hasan-i Sabbah supported the succession of Nizar over al-Mustali, leading to a schism. He established the Nizari Ismaili doctrine, emphasizing the authority of the imam and the use of taqiyya (dissimulation) for survival.

Hasan-i Sabbah died at Alamut, having led the Nizari Ismaili state for 34 years. He was succeeded by Kiya Buzurg Ummid. His legacy includes the creation of a resilient state that survived for over a century and the development of the Assassin legend.

Taejong, as Prince Yi Bang-won, played a key role in helping his father Yi Seong-gye establish the Joseon dynasty. He led military campaigns and eliminated rivals, including the assassination of Jeong Mong-ju.

Taejong led a coup against his own brothers and the prime minister Jeong Do-jeon, killing them to secure his position as heir. This rebellion consolidated his power but caused a bloody succession crisis.

Taejong implemented administrative reforms, including the establishment of the Uijeongbu (State Council) and a centralized military system. These reforms strengthened royal authority and reduced the power of aristocratic families.

Taejong purged hundreds of scholar-officials who opposed his rule, executing or exiling them. This eliminated dissent but created a climate of fear, solidifying his authoritarian control.

Taejong abdicated the throne to his son Sejong the Great, but continued to influence state affairs as a retired king. This transition ensured a stable succession and allowed Sejong to implement his own reforms.