New subscriber, Alan, asked how I mark my troops:
The first picture is of the German Pz Grens (Yellow background, black writing) Marked with the Company number: in this case, 2nd. And then a dot to say which platoon/unit. In this case you can see that 3rd platoon, 2nd CO is flanking from the tanks right. The 1st platoon, 2nd Company is attacking the front. And, Weapons platoon (4 dots) flanking from the left.
This second photo is similar. Except, I use letters because the US used letters to designate the companies. The unit at the top and by the tanks is an engineer platoon (gray with black writing).