" By March 1916, the various armies of Europe had devised a simple rote method for attacking their entrenched foes: a sustained artillery bombardment of the enemy’s forward defenses, one that might last a few hours or several days depending on the scale of the planned assault, followed by an infantry rush across no-man’s-land. The problems with these tactics were manifest at every step. Most such bombardments caused relatively few casualties, since the defenders simply retreated to back trenches—or, in the more sophisticated trenchworks of the Western Front, into heavily protected underground bunkers—to await their conclusion. Naturally, these preliminary barrages also alerted the defenders both that an assault was coming and its precise location. "

― Scott Anderson , Lawrence in Arabia: War, Deceit, Imperial Folly, and the Making of the Modern Middle East