With a special about siege and guild warfare!
"In order to let everyone enjoy the adrenaline-pumping siege gameplay in Age of Conan: Hyborian Adventures, we devised something called the mercenary system. Not everyone wants to join a big guild – not everyone has the time to join a big guild – so Funcom knew that we had to give even the lone wolves of Hyboria the opportunity to satisfy their thirst for large-scale, epic battles.

«With the mercenary system your guild will be able to recruit other players to fight for their cause, no matter if you're the defending or the attacking guild,» says Stone. «They simply put out a mercenary request promising a certain amount of gold for services rendered, and as a player you can search for these at any time, choose one, and jump more or less right into the fray.»"

I think thats pretty freaking cool!