Siegfried Sassoon, "Remorse"

RemorseLost in the swamp and welter of the pit, He flounders off the duck-boards; only he knows Each flash and spouting crash, --each instant lit When gloom reveals the streaming rain. He goes Heavily, blindly on. And, while he blunders,'Could anything be worse than this?' --he wonders, Remembering how he saw those Germans run, Screaming for mercy among the stumps of trees: