Shortly after his ascension, Baha al-Din became famous among his subjects, and patronized many scholars such as the prominent
Iranian philosopher
Fakhr ad-Din ar-Razi. In 1198, Baha al-Din wrested
Balkh from
Kara-Khitan control after the death of its governor. During the same year, war broke out between the Ghurids and the
Khwarazmian dynasty, which was supported by their suzerain Kara-Khitans; the Khwarazmians attacked
Herat, while the Kara-Khitans invaded
Guzgan, and demanded tribute from Baha al-Din. However, the Ghurids shortly managed to inflict a heavy defeat on the two empires, and then used the opportunity to conquer
Marv,
Sarakhs, Nasa,
Abiward,
Tus, and
Nishapur. Several Ghurid princes were shortly appointed as the governor of the cities, which included a nephew of Baha al-Din's grandfather
Fakhr al-Din Masud,
Taj al-Din Zangi. In March 1203, Ghiyath al-Din Muhammad died of illness, and was succeeded by his brother Mu'izz al-Din Muhammad as the head of the Ghurid dynasty. Shortly after Ghiyath's death, however, the Khwarazmian-shah
Muhammad II invaded the Ghurid Empire, and besieged Herat. Mu'izz, along with his general
Husain ibn Kharmil, quickly managed to Muhammad from Herat and then pursued him to
Khwarezm, where the Ghurid army besieged the Khwarazmian capital of
Gurganj. However, the Ghurids were shortly forced to retreat back to
Ghur, but suffered a heavy defeat during the retreat. After Mu'izz's return to Ghur, he, along with Baha al-Din prepared a new Ghurid expedition into Khwarezm. During the same period, a Ghurid prince named
Ala al-Din Atsiz married a daughter of Baha al-Din. However, Mu'izz al-Din was soon assassinated in 1206, which resulted in a civil war; Baha al-Din Sam was supported by the native Iranian soldiers, while the Turkic
ghulams supported Ghiyath al-Din Muhammad's son
Ghiyath al-Din Mahmud. Baha al-Din Sam II, however, died a few days later of illness, and was succeeded by his son
Jalal al-Din Ali, who, along with his brother
Ala al-Din Muhammad, were supported by their father's supporters. == References ==