The more mercenaries you find at once, the better deal they will offer. If recruited from taverns, they will demand an initial fee which is based on the type of mercenaries and number available. You can also rescue them from parties that have destroyed caravans. They are easily found in taverns, but they can also be acquired by attacking caravans and then convincing the surviving caravan guards to join you.
Mercenaries are hired, often very powerful soldiers that can be paid to fight by your side. For the mercenary troops in With Fire & Sword, see Mercenaries (With Fire & Sword).
