Move him into the sun- (line 1)
The poem begins with the narrator ordering that the man be moved into the sun; this leads us to believe that the narrator is of a high rank than the person he was talking to, someone of low rank would not be giving orders to someone who outranked him.
Gently its touch awoke him once,
At home, whispering of fields half-sown. (2- 3)
The sun is personified in this poem; the sun is described as gently touching the man, rousing him from sleep, which is a motherly thing to do. The sun woke the man briefly, and his last moments were filled with memories of his childhood on a farm. The sun whispers to him, which is another human quality. Fields half-sown has a dual meaning: first, fields are only partially seeded (it's the beginning of planting season); second, it is a metaphor for a life not fully lived. Many soldiers in WWI were barely eighteen years old, and hadn't even had the opportunity to experience life.
Always it woke him, even in France,
Until this morning and this snow.
If anything