B: Confederate forces fired upon and captured Fort Sumter. U.S.
Germany, Italy, and Japan
Because when the natural rubber supply from Southeast Asia was cut off at the beginning of World War II, the United States and its allies faced the loss of a strategic material. <span> So the companies, in collaboration with a network of researchers in government, academic, and industrial laboratories, developed and manufactured in record time enough synthetic rubber to meet the needs of the U.S. and its allies during World War II.</span>
She was America's first prima ballerina, and the first Native American to do so. Her dancing revolutionized ballet, and though she retired in 1966 she continued to actively promote ballet in Chicago.
