“On July 1st the weather, after an early mist, was of the kind commonly called heavenly,” the poet and author Siegfried Sassoon recalled of that Saturday morning in northeastern France. This second lieutenant in the Royal Welch Fusiliers and his brother officers breakfasted at 6 a.m., “unwashed and apprehensive,” using an empty ammunition box for a table. At 6:45 the British began their final bombardment. “For more than forty minutes the air vibrated and the earth rocked and shuddered,” he wrote. “Through the sustained uproar the tap and rattle of machine guns could be identified; but except for the whistle of bullets no retaliation came our way until a few 5.9[-inch] shells shook the roof of our dugout.” He sat “deafened and stupefied by the seismic state of affairs,” and when a friend of his tried to light a cigarette, “the match flame staggered crazily.”