Ustadh Sis

Ustadh Sis (also spelled: Ustad Sis, or Ostad Sis, Persian: استاد سیس‎) was a Persian heresiarch and anti-Arab rebel leader. They write that he was once a governor of Khorasan and father to Ma'mūn’s Iranian mother, Marjil, which makes him Ma'mūn's grandfather.

He claimed he was a prophet of God in the eastern fringe of Khorasan in the mid 8th century and managed to gain followers among the villagers in that area. Many were previously followers of Bihafarid, whom the Abbasid commander, Abu Muslim, crushed militarily.

Reinvigoration of Bihafarid's movement
See also: Bihafarid, Abu Muslim, Abbasids, Al-Mansur, and Al-Mahdi

Ustadh Sis launched a rebellion in 767, purportedly with 300,000 fighting men.[1] His initial base was the mountainous region of Badghis, and he soon occupied Herat and Sistan before marching towards Merv. He initially defeated an Abbasid army under the command of al-Ajtham of Merv, but was himself defeated in a bloody battle against an army led by al-Mahdi, the son of the Caliph al-Mansur (and a future Caliph himself).

Suppression of Ustadh Sis rebellion
See also: Khazim ibn Khuzayma al-Tamimi and Abu Awn Abd al-Malik ibn Yazid

According to al-Tabari, 70,000 of Ustadh Sis's followers were killed in the battle, and 14,000 were taken captive.[1] Ustadh Sis managed to flee to the mountains, but the general Khazim ibn Khuzayma al-Tamimi followed him and was able to capture him. Ustadh Sis was sent in chains to Al-Mansur, who ordered his execution. Later, Al-Mahdi gave amnesty to 30,000 captives.

gollark: `ssh sinthorions-computer.com cat /proc/cpuinfo`
gollark: That's horrible.#
gollark: processor : 0vendor_id : AuthenticAMDcpu family : 23model : 1model name : AMD Ryzen 3 1200 Quad-Core Processorstepping : 1microcode : 0x800111ccpu MHz : 3410.279cache size : 512 KBphysical id : 0siblings : 4core id : 0cpu cores : 4apicid : 0initial apicid : 0fpu : yesfpu_exception : yescpuid level : 13wp : yesflags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate sme ssbd sev vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smcabugs : sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypassbogomips : 6989.20TLB size : 2560 4K pagesclflush size : 64cache_alignment : 64address sizes : 43 bits physical, 48 bits virtualpower management: ts ttp tm hwpstate eff_freq_ro [13] [14]
gollark: Look, it even lists the bugs!
gollark: Get a stupid home.

See also

References
  1. al-Tabari, Muhammad ibn Jarir (1990). The History of al-Tabari Vol. 29: Al-Mansur and al-Mahdi A.D. 763-786/A.H. 146-169. SUNY Press. pp. 44–48. ISBN 9780791401439.
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