Dalban is a nation near Daventry. Dalban had plans to attack Daventry, and was preparing its armies. It seemingly hired the mercenary Relentless Army, an army of assassins to attack the kingdom. Although it is possible that the Relentless Army chose to attack Daventry on its own accord.
The map of Daventry in the Relentless Army camp, shows a southern border to Daventry. It is possible that Dalban is the southern nation on the map.