HELP WITH HISTORY!!. Japan attacked Pearl Harbor to limit the ability of the United States to?. a.fulfill its Lend-Lease commitments with Britain.. b.resist Japan’s invasion of America’s west coast.. c.slow Germany’s invasion of the Soviet Union.. d.mount a strong resistance to Japanese expansion in Asia and the Pacif. . During World War II, the United States and the Soviet Union were united in?. . World War II increased opportunities for women because?. . Which one of the following was an important precedent set during the Korean War?. .