The Iceland Defense Force (IDF) was a military services command of the United States Armed Forces from 1951 to 2006. The IDF, designed at the ask for of NATO, arrived into existence when the United States signed an settlement to deliver for the defence of Iceland. The IDF also consisted of civilian Icelanders and army customers of other NATO nations. 1999 NATO bombing of Yugoslavia. Fleming J, Mullen PE, Sibthorpe B, Bammer G (February 1999).