Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: During the Korean War, the Soviets and Chinese capture a U.S. Army platoon and take it to Manchuria in communist China. Three days later, Staff Sergeant Raymond Shaw and Captain Bennett Marco manage to return to UN lines. Upon recommendation of the platoon's commander, Captain  Marco, Shaw is awarded the Medal of Honor for saving their lives in combat. Shaw returns to the United States to a hero's welcome where he is exploited by his mother, Mrs. Eleanor Iselin, on behalf of the political career of her husband and Shaw's stepfather, United States Senator John Yerkes Iselin. When asked to describe him, Marco and the other soldiers automatically respond, "Raymond Shaw is the kindest, bravest, warmest, most wonderful human being I've ever known in my life.", even though Shaw is a cold, sad, unsympathetic loner.
In the years to follow, Marco, who has since been promoted to major and assigned to Army Intelligence, suffers from a recurring nightmare. In it, a hypnotized Shaw blithely and brutally murders the two missing soldiers before an assembly of military leaders from the communist nations, during a practical demonstration of a revolutionary brainwashing technique. Marco is compelled to investigate, but with no solid evidence to back his claims fails to receive support from his uplines. However, Marco learns that another soldier from the platoon, Allen Melvin, has had the same nightmare. When Melvin and Marco separately identify the identical two men from their dreams as leading figures in communist governments, Army Intelligence agrees to help Marco investigate.
A:
Where is the group that Captain Marco commands prior to escape?