Battle of Baghdad (1258)
Under Guo Kan's order, the Chinese counterparts in the Mongolian army then laid siege to the city, constructing a palisade and ditch, wheeling up siege engines and catapults. The siege started on January 29. The battle was swift, by siege standards. By February 5 the Mongols controlled a stretch of the wall. Al-Musta'sim tried to negotiate, but was refused.