After the Doom of Valyria the Dothraki first rode out east of the Dothraki Sea, it can be assumed that the fall of Valyria and the chaos that followed it is what prompted (and perhaps allowed) the Dothraki to attack with such power. 50,000 Dothraki, at least half of them warriors, were led by horse lord khal Temmo, sacking and burning every town and city in their path.[1]
Aware of the Khalasar advance, the Qohor strengthened their walls, doubled their garrison, and hired two mercenary companies besides, Bright Banners and the Second Sons. They also sent a man to Astapor purchased three thousand Unsullied.[1]
Battle
During the first day of the fighting the Dothraki were unmatched, Qohor forces were shattered, its heavy horse annihilated and the sellsword companies had fled in the face of hopeless odds. The Dothraki had retired to their camps to drink, feast and rest. before their final assault at dawn brake. However, during the night, the three thousand Unsullied has finally reached the city and come dawn, was waiting the Dothraki horde arrayed in battle formation before the city gates.
The Dothraki, could have easily out flank such a small force but in their contempt for infantry, launched a direct frontal assault, in an attempt to simply ride down the heavy infantry. Eighteen times they charged and attacked the Unsullied ranks and Thrice their archers wheeling past raining arrows on the Three Thousand, each time failing to break through.
Finally the Dothraki halted their attacks after the Khal, his bloodriders and sons had been killed. Their losses were staggering: 12.000 dead. Only 600 Unsullied remained, but the victory was theirs nonetheless. Four days later, the new khal led his remaining khalasar past the city gates in a stately procession. Each man cut off his braid and threw it down before the Unsullied.[1][2]
Aftermath
Since that day, the city guard of Qohor has been made up entirely of Unsullied. Each of them carries a spear with a braid made of human hair attached to i
