From A Wiki of Ice and Fire
The Pepper Coast is a region noted for its corsairs. It's exact location is unknown.
In 83 AC, in preparation for his invasion of the Stormlands, Prince Morion Martell hired fleets from the pirates of the Stepstones, the sellsails of Myr, and the corsairs of the Pepper Coast to invade the stormlands. However, it took the better part of a year to gather all his strength, and the Targaryens had known about the upcoming attack for half a year in advance, in part due to the indiscretion of the pirates, sellsails, and corsairs. After the defeat of Morion's army in 84 AC, the corsairs of the Pepper Coast became less troublesome for a while.
- ↑ Fire & Blood, The Long Reign - Jaehaerys and Alysanne: Policy, Progeny, and Pain.