The Bloodreavers, headed by Chief Krand, were a gang of hobgoblins based out of the Chamber of Eyes. They would raid the lands surrounding Fallcrest in search of slaves to sell to the less savory races of the underdark, namely the duergar living in The Horned Hold.
They recently captured many halflings from Riverdown which got the attention of both the lord of Fallcrest and the Halfmoon Clan. Faren Markelhay has posted a bounty in Fallcrest to destroy their leader, Chief Krand.
Before they could grow their organization, they were defeated by the adventurers.