New Hearthglen is the sizable base of operations for the Scarlet Onslaught, the remnant of the Scarlet Crusade which has journeyed to Northrend in their campaign against the Scourge and any others who would oppose them. According to Abbendis' diary, the location of the fortress is very near where the Scarlet fleet made landfall: on the southeastern coast of the Dragonblight region. New Hearthglen serves as the main garrison and harbor for the majority of the Onslaught's troops and fleet.