Ammazing youve really caught the feel of the first world war "the jumbled mismatch of troops and the crazed idea of this kind of warfare".
1 thing i'll point out is your ground work, the grass work is brilliant but the ground colouring is 'off'. prehaps a dark sludgy brown with dry brushed light brown higlights to keep it more consistant.
( and if i not mistaken a fallschirmjager has time travelled, Airfix with broken arm LOL)
And from what i can see you do things well in such a small scale and its great how you segmented this, as each segment tells a diffrent story and is not just one giant busy scene.
Cheers,
Mat