Militia in civil cloths and tricornes are a good idea. I will write it down on my list.
Next out is mortars, medium machine guns and a few important missing pieces for the first release (sitting poses and another light machine gun). I have just asked the sculptor if he want to do a few more figures.
After that (if money permits mind you): dismounted cavalry.
Here is a picture of the early Landstorm (Home guard) soldiers. This is the look of the ww1. But most Landstorm geezers would perhaps have had an older ammunition bag.
