By 1807 approximately 500,000 Africans had been brought to the United States unwilling and forced into slavery

True

Explanation:

This was true as this characterized the period of slave trade. Blacks were moved from their home countries and transported on ships to mostly foreign and European countries such as the USA, Britain, Germany etc. The slaves were sold and used as labor in farmlands and other harsh and tedious activities.

By the year By 1807 approximately 500,000 Africans in total had been brought to the United States unwilling and forced into slavery by slave masters.

confedracy

supported slavery

upheld the supremacy of federal laws

believed states should be able to nullify federal laws

union

wanted to abolish slavery

supported high tariffs

upheld the supremacy of federal laws