Answer:
This timeline of events leading to the American Civil War is a chronologically ordered list of events and issues which historians recognize as origins and causes of the American Civil War. These events are roughly divided into two periods: the first encompasses the gradual build-up over many decades of the numerous social, economic, and political issues that ultimately contributed to the war's outbreak, and the second encompasses the five-month span following the election of Abraham Lincoln as President of the United States in 1860 and culminating in the capture of Fort Sumter in April 1861.
Scholars have identified many different causes for the war. Among the most polarizing of the underlying issues from which other proximate causes developed was whether the institution of slavery should be retained and even expanded to other territories or whether it should be contained and eventually abolished. Since the early colonial period, slavery had played a major role in the socioeconomic system of British America and was widespread in the Thirteen Colonies at the time of the American Declaration of Independence in 1776. During and after the American Revolution, events and statements by politicians and others brought forth differences, tensions and divisions between citizens of the slave states of the Southern United States and citizens of the free states of the Northern United States (including several newly admitted Western states) over the topics of slavery. In the many decades between the Revolutionary War and the Civil War, such divisions became increasingly irreconcilable and contentious.
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