The upper body is too long compared to the legs.
(The part between hip and neck)

The Helmet must be wider in the front view.
Also try to scale up the head a bit.

The Hand could be a bit bigger.

the whole upper chest-shoulder part should be more muscular,
that guy looks like he did'nt eat for long.

Apart from that it looks quite ok.

I see it as a coat that goes quite low, and relatively baggy pants, in which case it wouldn't be an issue, but if my interpretation isn't what you were going for then Damocles is right.

Decent though.

Jibb

maybe placing a belt would help to see the
correct position of the hips / waiste

The belt-attachments are there, so it cant be a long coat
covering it. (the bags would have to be under the coat then)

Oh yep, I see that. Especially when looking at the images the model is based on, the proportions could use a change.

Jibb

They wore a long coat with a belt around the waist. I know the proportions there are relatively correct. I haven't made a belt or anything yet. The boots are also basically the correct size. German uniforms were a little baggy. I've got some reference material that I can now use to make the uniform look realistic.