Nationalism. As Manifest Destiny was geared towards more of the individual people's growth (i.e go-getters) compared to Nationalism; the growth and advancement of the nation's people's as a whole.
When Robert Lee invaded the north for the second time, what
he wanted to accomplished are the following;
-
He wanted to force Lincoln to pull out the
troops
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He wanted to gain supplies for the Confed war
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He wanted to gain the union’s political balance
They helped maintain order in society and he mediated over disagreements over business contracts.
The president that declared war was William McKinley