 They then proceeded to Karshi, which had been strongly fortified and garrisoned by Sultan Ubaydullah Sultan, the chief of Bukhara.It was proposed to leave Karshi behind as had been done with success in preceding campaigns, but Najm, believing it was Sultan Ubaydullah Sultan's lair, declared that it must be taken.The city was therefore besieged and carried by storm with all inhabitants, Uzbek or not, being put to the sword regardless of age, sex, or sanctity.