THE YEAR WAS
Boomerang and the Butcher of Berlin
Written by L. J. Cole(writer and artist)
From Terrific Comics #2 - Boomerang is given his first mission - fly into Berlin as a German pilot with a message from the Fuhrer, find a murderous despot who likes chopping off heads, and eliminate him. Along the way he saves another prisoner named Diana.
Here are the pages I have of it.