<Li> Al - Jazira (modern Syria and northern Iraq): Hamdanids (890--1004 CE) → Marwanids (990--1085) and Uqaylids (990--1096) → Seljuks (1034--1194) → Mongol Empire and the Ilkhanate (1231--1335) </Li> <Li> Southwest Iran: Buyids (934--1055) → Seljuks (1034--1194) → Mongol Empire </Li> <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>

Describe the fall or decline of the abbasid caliphate