Waffen-SS foreign volunteers and conscripts
During World War II, the Waffen-SS recruited or conscripted significant numbers of non-Germans. Of a peak strength of 950,000 in 1944, the Waffen-SS consisted of some 400,000 "Reich Germans" and 310,000 ethnic Germans from outside Germany's pre-1939 borders (mostly from German-occupied Europe), the remaining 240,000 being non-Germans.
Source: Wikipedia — Waffen-SS foreign volunteers and conscripts (CC BY-SA 4.0)