'Dachstein' was a German operation against the partisan forces of Marshal Josip Broz Tito in the Slovenian region of Crni Vrh above Idrija, Vodice, Visnje, Col, Zagolic and Krizna mountain area in German-occupied Yugoslavia with purpose of securing the mercury mine at Idrija (24/25 March 1944).

The operation was undertaken by Generalleutnant Wilhelm von Hösslin’s 188^th Gebirgsdivision, which for this undertaking was divided into four Kampfgruppen (Kampfgruppe 'Heine' with 544 men of the 2^nd and 5^th Kompanien of the 139^th Gebirgsjägerregiment, five pieces of artillery, 10 mortars and 37 machine guns, and Kampfgruppe 'Christl', Kampfgruppe 'Auer' and Kampfgruppe 'Beecheider' each with about 300 men), the SS 'Kras' Battalion, and the 3/15^th SS Polizeiregiment.