Japan and the United States then entered into complex negotiations in the spring of 1941. Neither country would compromise on the China question, however, Japan refusing to withdraw and the United States insisting upon it. Believing that Japan intended to attack the East Indies, the United States stopped exporting oil to Japan at the end of the summer. In effect an ultimatum, since Japan had limited oil stocks and no alternative source of supply, the oil embargo confirmed Japan’s decision to eliminate the U.S. Pacific Fleet and to conquer Southeast Asia, thereby becoming self-sufficient in crude oil and other vital resources. By the end of November Roosevelt and his military advisers knew (through intercepted Japanese messages) that a military attack was likely; they expected it to be against the East Indies or the Philippines. To their astonishment, on December 7 Japan directed its first blow against naval and air installations in Hawaii. In a bold surprise attack, Japanese aircraft destroyed or damaged 18 ships of war at Pearl Harbor, including the entire battleship force, and 347 planes. Total U.S. casualties amounted to 2,403 dead and 1,178 wounded.
Pearl Harbor, HawaiiFord Island in Pearl Harbor, Hawaii, as seen from a Japanese aircraft during the attack on the U.S. Pacific Fleet, December 7, 1941.National Archives, Washington, D.C.
On December 8, 1941, Congress with only one dissenting vote declared war against Japan. Three days later Germany and Italy declared war against the United States; and Congress, voting unanimously, reciprocated. As a result of the attack on Pearl Harbor, the previously divided nation entered into the global struggle with virtual unanimity.
The United States at war
Although isolationism died at Pearl Harbor, its legacy of unpreparedness lived on. Anticipating war, Roosevelt and his advisers had been able to develop and execute some plans for military expansion, but public opinion prohibited large-scale appropriations for armament and defense. Thus, when Pearl Harbor was attacked, the United States had some 2,200,000 men under arms, but most were ill-trained and poorly equipped. Barely a handful of army divisions even approached a state of readiness. The Army Air Corps possessed only 1,100 combat planes, many of which were outdated. The navy was better prepared, but it was too small to fight a two-ocean war and had barely been able to provide enough ships for convoy duty in the North Atlantic. Eventually more than 15,000,000 men and women would serve in the armed forces, but not until 1943 would the United States be strong enough to undertake large-scale offensive operations. (For U.S. military involvement in World War II, see the article World War II.)
War production
United States: manufacturing during World War II Two women working at a Douglas Aircraft Company plant in El Segundo, California, c. 1940.Farm Security Administration-Office of War Information photograph collection/Library of Congress, Washington, D.C. (fsa 8e01286)
United States: manufacturing during World War IIMen working on bombers at an aircraft plant in Baltimore, Maryland, 1942.Schomburg Center for Research in Black Culture, Photographs and Prints Division, The New York Public Library (1211919)Roosevelt had begun establishing mobilization agencies in 1939, but none had sufficient power or authority to bring order out of the chaos generated as industry converted to war production. He therefore created the War Production Board in January 1942 to coordinate mobilization, and in 1943 an Office of War Mobilization was established to supervise the host of defense agencies that had sprung up in Washington, D.C. Gradually, a priorities system was devised to supply defense plants with raw materials; a synthetic rubber industry was developed from scratch; rationing conserved scarce resources; and the Office of Price Administration kept inflation under control.
After initial snarls and never-ending disputes, by the beginning of 1944 production was reaching astronomical totals—double those of all the enemy countries combined. Hailed at the time as a production miracle, this increase was about equal to what the country would have produced in peacetime, assuming full employment. War production might have risen even higher if regulation of civilian consumption and industry had been stricter.
Scientists, under the direction of the Office of Scientific Research and Development, played a more important role in production than in any previous war, making gains in rocketry, radar and sonar, and other areas. Among the new inventions was the proximity fuze, which contained a tiny radio that detonated an artillery shell in the vicinity of its target, making a direct hit unnecessary. Of greatest importance was the atomic bomb, developed by scientists in secrecy and first tested on July 6, 1945.
Financing the war
The total cost of the war to the federal government between 1941 and 1945 was about $321,000,000,000 (10 times as much as World War I). Taxes paid 41 percent of the cost, less than Roosevelt requested but more than the World War I figure of 33 percent. The remainder was financed by borrowing from financial institutions, an expensive method but one that Congress preferred over the alternatives of raising taxes even higher or making war bond purchases compulsory. In consequence the national debt increased fivefold, amounting to $259,000,000,000 in 1945. The Revenue Act of 1942 revolutionized the tax structure by increasing the number who paid income taxes from 13,000,000 to 50,000,000. At the same time, through taxes on excess profits and other sources of income, the rich were made to bear a larger part of the burden, making this the only period in modern history when wealth was significantly redistributed.
Social consequences of the war
Despite the vast number of men and women in uniform, civilian employment rose from 46,000,000 in 1940 to more than 53,000,000 in 1945. The pool of unemployed men dried up in 1943, and further employment increases consisted of women, minorities, and over- or underage males. These were not enough to meet all needs, and by the end of the year a manpower shortage had developed.
One result of this shortage was that blacks made significant social and economic progress. Although the armed forces continued to practice segregation, as did Red Cross blood banks, Roosevelt, under pressure from blacks, who were outraged by the refusal of defense industries to integrate their labour forces, signed Executive Order 8802 on June 25, 1941. It prohibited racial discrimination in job training programs and by defense contractors and established a Fair Employment Practices Committee to insure compliance. By the end of 1944 nearly 2,000,000 blacks were at work in defense industries. As black contributions to the military and industry increased, so did their demands for equality. This sometimes led to racial hostilities, as on June 20, 1943, when mobs of whites invaded the black section of Detroit. Nevertheless, the gains offset the losses. Lynching virtually died out, several states outlawed discriminatory voting practices, and others adopted fair employment laws.
Full employment also resulted in raised income levels, which, through a mixture of price and wage controls, were kept ahead of inflation. Despite both this increase in income and a no-strike pledge given by trade union leaders after Pearl Harbor, there were numerous labour actions. Workers resented wage ceilings because much of their increased income went to pay taxes and was earned by working overtime rather than through higher hourly rates. In consequence, there were almost 15,000 labour stoppages during the war at a cost of some 36,000,000 man-days. Strikes were greatly resented, particularly by the armed forces, but their effects were more symbolic than harmful. The time lost amounted to only one-ninth of 1 percent of all hours worked.