The city of Iceborough was created by the Walrus Herd some time in the past, partly as a place for the Walruses to inhabit during the six months of night experienced in the Northern Tundra. However, it also became a target for the herd's local rivals, the Orca Pod that eventually became the Northern Tundra Dark Egg Legion. Dr. Robotnik and Dr. Eggman also threatened Iceborough and its inhabitants on a number of occasions.(StH: #215, #216, CSE)