Crestfall is a large island off Kul Tiras’ northeast coast. It first came into importance during the Second War when the tides of darkness descended on Lordaeron and its member nations. When Alterac was destroyed, the orcish armies in the north staged a massive retreat. Admiral Proudmoore sent word that gnomish submarines had located the Horde's main naval base near Crestfall. Proudmoore believed that the Orcs planned to launch the remainder of their armada and retreat to the mainland of Azeroth. Lord Lothar ordered the base at Crestfall to be destroyed before the fleet could escape. This was known as the Battle at Crestfall. 
It is a sizable community of boaters and fishermen. These people do not like strangers, some visitors can be nearly shot when approaching a town at night on this island. The riflemen are constantly on guard from the naga that have been plaguing them recently. Rumors abound that a large naga force, under a warlord called Zethresh, hides near Crestfall’s west shore. Zethresh reputedly seeks to cleanse the ocean and the isles of human encroachment.