He stood alone in some queer sunless place
Where Armageddon ends. Perhaps he longed
For days he might have lived; but his young face
Gazed forth untroubled: and suddenly there thronged
Round him the hulking Germans that I shot
When for his death my brooding rage was hot.

He stared at them, half-wondering; and then
They told him how I’d killed them for his sake—
Those patient, stupid, sullen ghosts of men;
And still there seemed no answer he could make.
At last he turned and smiled. One took his hand
Because his face could make them understand.

Siegfried Sassoon

http://www.poemhunter.com/poem/enemies/