"It was at the microeconomic level, however, that the output war was really won. For the biggest wartime advances in mass production and management were made in vast factories like Ford's mile-long bomber assembly line at Willow Run, Boeing's B-29 plant at Seattle or General Motors' aero-engine factory at Allison. At peak, Boeing Seattle was churning out sixteen B-17S a day and employing 40,000 men and women on round-the-clock shifts. Never had ships been built so rapidly as the Liberty ships, 2,700 of which slid down the slipways during the war years. It was at wartime General Motors that Peter Drucker saw the birth of the modern 'concept of the corporation', with its decentralized system of management. And it was during the war that the American military-industrial complex was born; over half of all prime government contracts went to just thirty-three corporations. Boeing's net wartime profits for the years 1941 to 1945 amounted to $27.6 million; in the preceding five years the company had lost nearly $3 million. General Motors Corporation employed half a million people and supplied one-tenth of all American war production. Ford alone produced more military equipment during the war than Italy. Small wonder some more-cerebral soldiers felt they were risking their necks not in a 'real war . . . but . . . in a regulated business venture', as James Jones put it in The Thin Red Line. It was strange indeed that the recovery of the American economy from the Depression should owe so much to the business of flattening other peoples' cities."