Clarity/more questions

I need "in action" wounded not already patched up although I could have one or two of them behind the vehiles. Since I am doing am ambush(Western Germany) from close to the end of the war as the Bulge is finishing and the end is in site do I need to have Germans from one specific type of unit or can a have the be from a number of different branches of the Infantry? I.E. Grenadiers, Hitler's Youth, assult infantry, and more.