It is famous as the site of the 1929 Gutian Congress where Mao Zedong affirmed his leadership of the Zhu-Mao 4th Army (朱毛四军) and stamped out democratic tendencies among the troops.
Akkad's primacy instead seems to have been usurped by Gutian invaders from the Zagros, whose kings ruled in Mesopotamia for an indeterminate period (124 years according to some copies of the kinglist, only 25 according to others.) An illiterate and nomadic people, their rule was not conducive to agriculture, nor record-keeping, and by the time they were expelled, the region was crippled by severe famine and skyrocketing grain prices.
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The Third Dynasty of Ur came to preeminent power in Mesopotamia after several centuries of Akkadian and Gutian kings.
Tirigan was the last Gutian ruler in Sumer, who ruled for 40 days before being defeated by Utu-hengal of Uruk, ca.