<span>Harriet Tubman's primary role in the effort to abolish slavery was that he established the "Underground Railroad" (not an actual railroad), which helped slaves escape from the South to freedom. </span>
The factors that led to the surprise strategic attack of Pearl Harbor was due to many reasons, among which the Japanese imperialistic tendencies were the most obvious one. The Japanese really wanted to have control over those portions of the Pacific which is also the reason why they attacked Pearl Harbor.
Political party, I may be wrong I don't know but it should be correct.
