Merchant (Nilfgaardian Army Group 'Center' Camp)

There are actually three merchants at this location, not counting Quartermaster Tavar Eggebracht.

Merchant (burgundy chaperon)
This merchant is the one furthest north of the three and wears a burgundy chaperon hat. He sells a mix of goods including diagrams.

Merchant (red cap)
This merchant is just south of the one with the burgundy chaperon and sells the usual mix of random armor, weapons, and crafting components.

Merchant (light brown chaperon)
This merchant is to the west of the other two and near the unnamed noblewoman that gives the secondary quest, Blood Ties. He sells alchemy ingredients.