I want to know the answer to the following question:
What memorandum stated the circumstances for engaging in conflict above the 38th parallel?
All the background I'm provided with is that "On 30 September, Defense Secretary George Marshall sent an eyes-only message to MacArthur: "We want you to feel unhampered tactically and strategically to proceed north of the 38th parallel."". Is that enough to answer the question?
Answer: no