Background Information The Great Depression:The Great Depression was the severest economic crisis in American history. It began with the disastrous stock-market collapse in Wall Street on Oct,29,1929(also known as Black Friday),and ended in late 1941 when the U.S.entered World War II.During its worst period,which was in the early 1930s, sixteen million Americans about one-third of the labor force)become unemployed and production decreased by 40%.In 1932,Franklin Roosevelt was elected president.He carried out his New Deal measures to strengthen government control over the economy and provide public job for the unemployed.But the Depression did not end until the government began its defense spending before World WarⅡ.Background Information  The Great Depression: The Great Depression was the severest economic crisis in American history. It began with the disastrous stock-market collapse in Wall Street on Oct, 29, 1929 (also known as Black Friday), and ended in late 1941 when the U.S. entered World War Ⅱ. During its worst period, which was in the early 1930s, sixteen million Americans ( about one-third of the labor force) become unemployed and production decreased by 40%. In 1932, Franklin Roosevelt was elected president. He carried out his New Deal measures to strengthen government control over the economy and provide public job for the unemployed. But the Depression did not end until the government began its defense spending before World War Ⅱ