7.2 Mobilizing for Total War: Economy, Science, and the Manhattan Project

Labor boards and laboratory states

Independent OpenExamPrep teaching splits mobilization into two exam bundles that stems like to cross: labor and the controlled economy, and science and technology. The first bundle is the War Production Board, the Office of Price Administration, ration books, war bonds, full employment, and the Bracero contracts of 1942. The second is radar, penicillin, and the Manhattan Project—Oppenheimer, Los Alamos, Trinity. A candidate who can name Rosie the Riveter but not Donald Nelson will miss the agency item; a candidate who thinks Trinity was in Tennessee will miss the geography item.

WPB, OPA, stamps, and bonds

Conversion did not wait for a perfect org chart, but the chart still matters. The War Production Board (WPB) was created by executive order on 16 January 1942 and chaired by Sears executive Donald M. Nelson. It succeeded weaker pre-Pearl Harbor bodies (the Office of Production Management and the Supply Priorities and Allocation Board). The WPB’s job was priorities and allocations: who got steel, copper, aluminum, and rubber, and which civilian lines—automobiles, refrigerators—stopped so that Detroit and the new aircraft plants could build for the Army and Navy. U.S. output of aircraft, merchant shipping (Liberty ships), and tanks became the material fact behind “arsenal of democracy.” Do not hand the WPB to Herbert Hoover (Food Administration, 1917) or to Bernard Baruch (War Industries Board, 1918). Those are Chapter 5 names on a Chapter 7 stem.

The Office of Price Administration (OPA) began in April 1941 (before the war declaration) and received statutory muscle from the Emergency Price Control Act (30 January 1942). Leon Henderson is the early director associated with the office’s price-ceiling reputation. OPA fought inflation in an economy that had just escaped a decade of slack. It also administered rationing. Tires were first (January 1942) because Malaya and the Dutch East Indies—the world’s rubber—were gone. Sugar followed in the spring of 1942; gasoline started as an East Coast shortage and went nationwide by the end of 1942; meat, butter, coffee, and shoes entered the point-stamp system. A family did not only need money; it needed stamps. Black markets and “meatless” workarounds are color. The exam point is that price control plus rationing was the civilian counterpart of the WPB’s factory orders.

Paying for the war mixed taxes and borrowing. The Revenue Act of 1942 pulled millions of new households onto the income-tax rolls; the Current Tax Payment Act (1943) introduced mass withholding. That is why “the income tax became a class tax no longer” is a fair one-line summary. Series E “defense bonds,” restyled as war bonds after Pearl Harbor, were sold in eight nationwide drives with Hollywood tours and payroll deduction. Sales on the order of $185 billion are the conventional aggregate. Bonds soaked up purchasing power that rationing had not already immobilized. A stem that says the war was financed only by printing-press inflation, or only by a 1917-style elite Liberty Loan, is too simple.

Directed wartime economy (learn the pair)
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Factories and materials  ->  War Production Board (Nelson)
Prices and ration stamps ->  Office of Price Administration
Paychecks and bonds      ->  Treasury / war-loan drives
Wages and union peace    ->  National War Labor Board
Farm and track labor     ->  Bracero agreements (1942–)

Full employment, the NWLB, and Bracero

The draft and the factories emptied the unemployment lines. Historical annual rates fall from the mid-teens in 1940 to about 1 percent by 1944. That is full employment in the survey-course sense: overtime, labor hoarding, and employers hiring people they would not have trained in 1938. The National War Labor Board (NWLB), reconstituted in January 1942, supervised a wartime bargain. Many unions offered a no-strike pledge. In return the Board spread maintenance of membership (a union-security rule short of the closed shop) and applied the Little Steel formula (1942), which tried to cap wage increases near the rise in living costs from a January 1941 base. John L. Lewis’s mine walkouts punctured the pledge and helped produce the Smith–Connally Act (War Labor Disputes Act, 25 June 1943), which authorized government seizure of struck war plants and restricted union political spending. Labor history on this exam is not “unions disappeared”; it is federalized bargaining plus a statute when the pledge failed.

Fields and railroads still needed hands when citizens left for shipyards and infantry. On 4 August 1942 the United States and Mexico concluded the agreement that launched the wartime Bracero program: temporary, contract Mexican agricultural labor, later extended in various forms and also used on some rail lines. Braceros were not a footnote to “full employment”; they were how growers filled jobs the draft and higher factory wages had stripped. Do not confuse 1942 Bracero contracts with the 1960s end of the peacetime program, and do not file them as a Japanese American camp policy.

Radar, penicillin, Groves, Oppenheimer, Trinity

The scientific war is not one invention. Radar is the best single “electronics” story. In September 1940 Britain’s Tizard Mission brought the cavity magnetron to the United States—a device that made microwave airborne radar practical. MIT’s Radiation Laboratory then industrialized sets for night fighters, escorts, and proximity fuzes. A stem that credits radar solely to a 1945 American eureka moment misses the Anglo-American transfer.

Penicillin is the medical counterpart. Howard Florey and Ernst Chain’s Oxford group brought cultures and data to the United States in 1941. The Department of Agriculture’s Peoria laboratory and firms such as Pfizer (deep-tank fermentation) turned a scarce mold juice into a D-Day stockpile. Penicillin did not win the Battle of the Atlantic; it changed wound and pneumonia survival once the armies were ashore. Pair it with radar as scaled lab science, not as a substitute for the atomic project.

The Manhattan Project began as a small Uranium Committee after the Einstein–Szilard letter (dated 2 August 1939, delivered that autumn) warned Roosevelt that Germany might build a bomb. In 1942 the Army’s Manhattan Engineer District, under General Leslie R. Groves, took control. Three site names must stay unscrambled. Oak Ridge, Tennessee, separated uranium-235. Hanford, Washington, bred plutonium in piles along the Columbia. Los Alamos, New Mexico (Site Y), under physicist J. Robert Oppenheimer, designed the weapons. The uranium gun design (Little Boy) was considered reliable enough not to need a full-scale test. The plutonium implosion design was not. At Trinity, on 16 July 1945, at the Alamogordo bombing range in the New Mexico desert, the implosion device worked. Truman, already at Potsdam, now had a tested fact, not only a theory. Combat use over Hiroshima and Nagasaki is the next section’s military-diplomatic story; this section’s job is who built it, where, and when it was proved.

Exam traps: OPA rations civilians; WPB rations factories. Full employment is a 1943–45 labor-market fact, not a New Deal statute that abolished joblessness in 1933. Bracero is Mexican contract labor in 1942, not Japanese incarceration. Oppenheimer directed Los Alamos, not Hanford’s reactors. Trinity is July 1945 in New Mexico, not August over Japan. Radar’s wartime leap is an Allied sharing story, not a lone American patent date.