'nightmare ground'- metaphor, shows the horrors of war/ suggestion that the violent memories linger and torment the speaker.
'soldier sprawling in the sun'- sibilance emotive language, dead body is given no respect.
'frowning barrel of his gun'- personification, dead soldiers weapons are more powerful than him.
'like the entry of a demon.'- simile associates war with hell.
'who has put Steffi: Vergismeinnicht.', makes it personal, show how war is between humans even the enemy has a life back home.
'we see him with almost content, abased and seeming to have paid and mocked by his ownequipment' -> the soldiers take pleasure, believes he deserved it. Personification of the equipment -> irony.
'burst stomach like a cave'- simile, gruesome imagery. 'burst'- onomatopoeia.
'for here the lover and killer are mingled.'- this shows the realisation that the soldier was a human being with people who cared for him.
'and death who had the soldier singled.- death has conquered the soldier AND lover. This is the personification of death.