D.J.R. Bruckner, in the New York Times, had this to say about the Oxford War Poetry, first published in 1984:
Mr. Stallworthy comes well prepared to write about that breed. His biography of Wilfrid Owen swept the field of prizes when it appeared; he is the definitive editor of Owen's poems and his knowledge of war literature is wide. In his introduction to this anthology he traces the lineage of World War I poets to the 18th-century English public school, its curriculum chock full of ancient heroic poetry which upper-class youth took as personal inspiration. By 1918 the ideal had died with the class in the in the trenches. The emotional power of the poems written by the best of the group comes not only from their recognition of the degradation and hopelessness of soldiers, but from a feeling they were turning their backs on their upbringing. They would never again believe with James Thomson that 'guardian angels' sang the refrain of his hymn, 'Rule, Britannia!'
("No More Famous Victories," February 24, 1985, p. 340)
Stallworthy also talks at length about war poetry in the documentary Voices in Wartime (transcripts of interviews). Here's Oxford's catalog page for the second reissue paperback.