<Li> Khorasan (modern Iran, Afghanistan and Turkmenistan): Tahirids (821 - 873) → Saffarids (873--903) → Samanids (903--995) → Ghaznavids (995--1038) → Seljuks (1038--1194) → Ghurids (1011--1215) → Khwarazmians (1077--1231) → Mongol Empire and the Ilkhanate (1231--1335) </Li> <Li> Transoxiana (modern Central Asia): Samanids (819--999) → Karakhanids (840--1212) → Khwarazmians (1077--1231) → Mongol Empire and the Chagatai Khanate (1225--1687) </Li> <P> In 656 AH / 1258 CE, the year of the fall of Baghdad, and following the sack of the city, a few surviving members of the Abbasid dynastic family led by the eldest amongst them, Ismail II son of Hamza son of Ahmed son of Mohamed, made their way into the region of Fars in Southern Persia . They settled in the city of Khonj, then a great centre for learning and scholarship . Shaikh Abdulsalam Khonji (b . 661 AH--d . 746 AH) son of Abbas son of Ismail II was born in Khonj only five years after the fall of Baghdad and the arrival of his grandfather in the city . He became a great religious scholar and Sufi saint, held in high esteem by the local populace . His tomb still stands in Khonj and is a site visited by people from near and far . </P> <P> The descendants of Shaikh Abdulsalam Khonji were religious scholars and figures of great respect and repute for generation after generation . One such scholar and direct descendant of Shaikh Abdulsalam Khonji in the male line, Shaikh Mohamed (d. around 905 AH) son of Shaikh Jaber son of Shaikh Ismail IV, moved to Bastak . His grandson, Shaikh Mohamed the Elder (d . 950 or 975 AH) son of Shaikh Nasser al - Din Ahmed son of Shaikh Mohamed, settled in Khonj for a time . But in 938 AH, in response to growing Safavid power, Shaikh Mohamed the Elder moved permanently to Bastak as his grandfather had done . His own grandson, Shaikh Hassan (d . 1084 AH) (also called Mulla Hassan) son of Shaikh Mohamed the Younger son of Shaikh Mohamed the Elder, is the common ancestor of all the Abbasids of Bastak and its neighbouring areas . </P>

Who were the abbasid dynasty and what did they achieve