I always thought at least in 1941 Hitler had refused any kind of Russian based organizations in Wehrmacht (??).
Russian Defence Corps
Incorporated into the Wehrmacht, Independent Russian Corps was formed on September 12th, 1941 form Russian Imperial Army veterans. On October 2nd it was renamed Russian Defence Corps (Russisches Schutzkorps) - max strength 3000. From September 15th it come under the command of Lieutenant-General Boris Alexandrovich Shteyfon. It had three regiments and a total strength of 4,000. From November 18th 1941 to November 30th 1942 it was named Russian Defense Group.
Russian Defence Corps