"Dog Company: War Stories, Part One" is the twenty-eighth issue of Fables.
Publisher's summary
"War Stories," Part 1 of 2. It's Germany, 1944, and Bigby Wolf, a member of Dog Company, is sent to the hills to find a monster named after a certain doctor who's too tough to kill...because he's already dead.
Plot
Bigby visits his old World War buddy, Shawn Duffy, who has terminal cancer. He gives Bigby a book about all his war adventures that he wants him to have. In the story, soldiers drop out of planes and into German-infested areas, where while camping out, Bigby appears. Due to Bigby's incredible senses including smell, he could detect anyone near their position. Some soldiers including Bigby disguise themselves with Nazi uniforms. Bigby leads some troops though a secret tunnel underneath the castle crawling with Nazis. Bigby alone enters into the scientists lab where they are working and finishing with Frankenstein.