Abwehrgruppe 218, known under the codename "Edelweiss" () was an Nazi German anti-partisan unit operating in Slovakia during World War II. Unit was led by SS-Sturmbannführer Erwein von Thun-Hohenstein. It was constituted during September 1944. In the period from September 1944 to April 1945 carried out more than 50 missions, which resulted in killing around 300 people, including civilians, another 600 were taken prisoners. Unit is known for a number of war crimes, especially the massacre of civilians in the villages Ostrý Grúň a Kľak, which are considered among the most brutal war crimes committed on Slovak territory during the war.