WWII US Army Kiska Task Force oilskin patch. The Kiska Task Force took part in Operation Cottage - the only combat operations on US soil during WWII. The KTF was a precursor to the 1st Special Service Force, which was itself a manner of precursor to US Special Forces of the post war era. This item is part of long-time collector Verkuilen Ager's collection and many of these have been in his possession since the early and mid-1980's.