Galadriel55, you and I are going to have to meet some day at the McMichael Gallery.
Years ago I posted some pictures of medieval battles. I shall go off and attempt to find them so I can add a link here.
EDIT:
Yes, I have just accomplished something with the search function here. Here's a link to the pictue (just one), in a discussion of Book 5, Chapter 6
Bruegel battlefield.
The interesting point here is that the picture has no central focus. I wonder if Tolkien's many chapters which repeat events occuring at the same time but in different places is something of an attempt to present this idea of art without one central perspective.