The second, which culminated in World War I, was driven by massed firepower, and is expressed in the saying, reportedly coined at the Battle of Verdun in 1916, “artillery conquers, infantry occupies.” And the third generation – perfected by Germany with the “blitzkrieg” method employed in World War II – emphasized maneuver over force, with militaries using infiltration to bypass the enemy and collapse its force from the rear, rather than attacking frontally.