Джувейни
With the capture of Bukhara, the way was clear for the Mongols to advance on the capital of Samarkand, which possessed significantly better fortifications and a larger garrison compared to Bukhara. To overcome the city, the Mongols engaged in intensive psychological warfare, including the use of captured Khwarazmian prisoners as body shields. After several days only a few remaining soldiers, loyal supporters of the Shah, held out in the citadel. After the fortress fell, Genghis executed every soldier that had taken arms against him. According to the Persian historian Ata-Malik Juvayni, the people of Samarkand were then ordered to evacuate and assemble in a plain outside the city, where they were killed and pyramids of severed heads raised as a symbol of victory. Similarly, Juvayni wrote that in the city Termez, to the south of Samarkand, "all the people, both men and women, were driven out onto the plain, and divided in accordance with their usual custom, then they were all slain".