What does the term secondary source mean?

A secondary source of information is one that was created later by someone who did not experience first-hand or participate in the events or conditions you're researching.

Explanation:

Secondary sources were created by someone who did not experience first-hand or participate in the events or conditions you're researching. For a historical research project, secondary sources are generally scholarly books and articles

Explanation:

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else

1. temperance, abolitionist, suffragist