Our brains ache, in the merciless iced east winds that knive us . . . This use of a personification helps us imagine how the soldiers are feeling fighting against, not only their enemies but nature itself
Watching, we hear the mad gusts tugging on the wire, Like twitching agonies of men among its brambles. This use of a simile shows us what the reader has seen and sets the scene by showing what was in the barbed wire
We only know war lasts, rain soaks, and clouds sag stormy. This use of listing gives us the straight facts and shows us how the soldiers are felling in the trenches
Sudden successive flights of bullets streak the silence. Less deadly than the air that shudders black with snow, This use of personification shows us how the soldiers are feeling: that they would rather be hit by bullets than to suffer in the snow
Pale flakes with fingering stealth come feeling for our faces— This use of personification helps us imagine what is happening and what the soldiers are felling at the same time. The consonance of 'f' shows how many snowflakes there are.
Tonight, this frost will fasten on this mud and us, Shrivelling many hands, and puckering foreheads crisp. The use of complex vocabulary specifies what is happening.