I have this in a book called WWII by James Jones.
It is all works by Combat Artists mostly US and British, but a few German and Japanese.
The Picture was painted on the island of Pelielu
And the Author descibed the painting was done in oils. Making it nearly impossible to create on a battlefield. The author makes notions that this could be something the artist created and didnt actually see, but was horrified by something deeply enough to paint it.
None the less its a ghastly picture, I like the drawings by Sgt Howard Brodie, like Massacre at Malmedy, Numbing Cold, and Battlefield Excecution. Those are very erie.