Even wild hogs have a history

In the long history of invasive species in Appalachia, no story is more striking that that of the European wild boar. Often called Russian boars, they probably came from Germany. In 1908 an English corporation established a private hunting preserve in Graham County, NC, and stocked it with game animals including buffaloes, Russian bears, and wild boars. None flourished except the shrewd and resourceful boars that soon escaped into the mountain wilderness where they have proved enormously destructive of the woodland ecology. In 1959 the Great Smoky Mountains National Park began an eradication program that has to date removed over 10,000 hogs. But still they survive, a continuing threat to the wellbeing of the natural environment.

via European Wild Boars.