Why is primary sources and secondary sources useful in historical research?

primary sources- are when the person who wrote this was actually there and saw everything happen.

A secondary source- is when the writer is going based off other information .

Explanation:

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one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.

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