For access to more resources, spreading ideologies (white man’s burden)
Answer:Battle of Antietam
Explanation:The Union's important victory at the Battle of Antietam gave Lincoln enough public support to issue the Emancipation Proclamation, which promised to free all slaves in the Confederacy. A month before the Civil War began in April 1861, Abraham Lincoln talked about slavery in his first speech as president.
Because the american people had different thoughts on the war.
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What in the world of worlds are you talking about?