<span>Manifest Destiny was a major influence on how the frontier developed. Manifest Destiny is the doctrine that our land was one that was destined to stretch from sea to shining sea. The reason that this was influential in the frontier's development is that when plans were being made, instead of slowly expanding outwards, the country exploded out living a middle frontier that was neither as developed as California or the East. </span>
Created the spoils system and made the Democratic Party.
The federal government and the 50 states <span />
<span>When 128 American civilians were killed by the sinking of the Lusitania, a British luxury passenger ship.</span>
<span>Anti-slavery publications were produced.
The American Anti-Slavery Society was founded.
I think however I'm not 110% sure about it.
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