The Kalmykian Cavalry Corps (German: Kalmücken-Kavallerie-Korps; also known as: German: Kalmücken Verband Dr. Doll, Oirat: Доктор Доллин Хальмг мөртә церг, romanized: Doktor Dollin Xalmg mörtä tserg, [ˈdoktər ˈdolin xɑlʲˈmək mœrˈtæ t͡sɛˈrək], Dr. Doll Kalmyk Formation (Dr. Doll was an alias of Otto Werba [ru])) was a unit of about 5,000 ethnic Kalmyk volunteers who chose to join the German Army in 1942 rather than remain in Kalmykia as German forces retreated before the Red Army.

[1] Stalin subsequently declared the Kalmyk population as a whole to be German collaborators in 1943 and ordered mass deportations to Siberia suffering great loss of life.

When Erich von Manstein led the 16th Motorized Infantry Division into Kalmykia in early 1942 he already had some Kalmyk advisors from a committee drawn together by Goebbels for propaganda purposes.

The KKK acted within the German Wehrmacht as an independent allied force with all leadership positions taken by Kalmyks.

At the end of 1944, the surviving Kalmyk cavalry troops, together with their families, retreated with the German army.