Bill Savage (artist), Robert Bernstein (writer)
Found in Spy Cases #11 - 7 pages - Another Korean War tale - [Note: The badge emblem normally on the title panel is missing but the character is identified as Doug Grant.] Grant takes the guise of a corporal fleeing into the hands of the enemy to escape death. His plan was to provide disinformation about a planned attack. Being thrown into a prison camp, he decides to stop the executions being done there.
Here are the pages I have of it.