What was the primary reason why seven states seceded
from the union in 1860 and 1861? *

Because they were convinced that Lincoln was going end slavery.

Explanation:

the answer is: the sesquicentennial of the american civil war is an occasion to consider the legacy of that great conflict. this legacy is our inheritance, and despite many indelible features, we continue to negotiate the resolution of that conflict. the civil war was fought over slavery, but not always on behalf of slaves

britian is way too advanced for me my good luck