Joe, several things jump out at me.
First, the tomb is sitting on top of the groundwork. You need to lay such a structure on the base and build the ground work ou next to it. Look at the foundation of a house and you'll see what I mean.
Second, the one armed man. His uniform says American and Americans are shooting at him, or so it seems. If he just got shot, as gruesome as it seems, you need to have the arm next to him. If he is supposed to have just gotten there, there needs to be a blood trail, but a traumatic would that severe would cause exsanguination very quicklly. He's be in shock in seconds and dead moments later.
Third, the ground work is confusing. You have barren soil and deal looking trees with oversized clumps of very tall grass.
And lastly, get away from those old Tamiya figures. Painting them is like trying to make the proverbial silk purse from a sow's ear.
I'm making the assumption you posted these pictures to get advice and not just hollw praise.