From A Wiki of Ice and Fire
The Bright Banners were a mercenary company found mainly in the Free Cities.
Shortly after the doom of Valyria the Bright Banners and Second Sons were hired by the Qohorik to defend against Khal Temmo's khalasar. The Battle of Qohor ensued, and in the face of hopeless odds both companies fled.
- ↑ A Storm of Swords, Chapter 8, Daenerys I.