There’s a book called Complicated Complicity which covers much of the collaboration of different nations in WWII.

The Germans enlisted 250,000 native Ukrainians for duty in five separate formations including the Nationalist Military Detachments (VVN), the Brotherhoods of Ukrainian Nationalists (DUN), the SS Division Galicia, the Ukrainian Liberation Army (UVV) and the Ukrainian National Army (Ukrainische Nationalarmee, UNA).

The SS Galicia was comprised almost entirely of volunteers. As was the Nachtigall Battalion and Roland Battalion. By the end of 1942, in Reichskommissariat Ukraine alone, the SS employed 238,000 native police and 15,000 Germans, a ratio of 1 to 16.

This information is available on the internet with a bit of careful digging. :o)