Near the end of the chapter, the phrase "separate peace" is used. Explain its meaning in the context of the passage .

The carnival the boys had concocted was an escape from the cold grey realities of Devon and the war, it was a separate peace.

"It wasn’t the cider which made me surpass myself, it was this liberation we had torn from the gray encroachments of 1943, the escape we had concocted, this afternoon of momentary, illusory, special and separate peace."