Certainly not a bad start in the dark art of figures. Actually, a pretty good piece.
Some things to watch out for:
Your paints tend to run on to other color. Invest is some really good artists' brushes with fine points to do the webbing and stuff like cuff edges. (pictures 1 and 3)
I think WWII boots were brown, not black.
Looks like some paint got worn off the back of the leg in picture 1. Using a primer coat and washing the parts will help here.
A bit more differentiation between the pants and the spats would look better.
Each color looks a bit monochromatic. Try to work on highlights and shadows to give more depth to the colors. Check out armorama dot com and acrylicosvallejo dot com (englsh then "model color" for informaion on painting with acrylics.
Again, a very good start in figure painting.