[custom_adv] The Statue of Liberty in New York City, dedicated in 1886, is a symbol of the United States as well as its ideals of freedom, democracy, and opportunity.Differences of opinion regarding the slavery of Africans and African Americans ultimately led to the American Civil War. [custom_adv] Initially, states entering the Union had alternated between slave and free states, keeping a sectional balance in the Senate, while free states outstripped slave states in population and in the House of Representatives. [custom_adv] But with additional western territory and more free-soil states, tensions between slave and free states mounted with arguments over federalism and disposition of the territories, whether and how to expand or restrict slavery. [custom_adv] This led to Missouri's controversial denouncement of the issue, as well as the formation of many short-lived territories such as the State of Scott, a county that left Tennessee to stay anti-slavery. [custom_adv] With the 1860 election of Abraham Lincoln, the first president from the largely anti-slavery Republican Party, conventions in thirteen slave states ultimately declared secession and formed the Confederate States of America (the "South"), while the federal government (the "Union") maintained that secession was illegal. [custom_adv] In order to bring about this secession, military action was initiated by the secessionists, and the Union responded in kind. The ensuing war would become the deadliest military conflict in American history, resulting in the deaths of approximately 618,000 soldiers as well as many civilians. [custom_adv] The South fought for the freedom to own slaves, while the Union at first simply fought to maintain the country as one united whole. Nevertheless, as casualties mounted after 1863 and Lincoln delivered his Emancipation Proclamation, the main purpose of the war from the Union's viewpoint became the abolition of slavery. [custom_adv] Indeed, when the Union ultimately won the war in April 1865, each of the states in the defeated South was required to ratify the Thirteenth Amendment, which prohibited slavery. [custom_adv] Three amendments were added to the U.S. Constitution in the years after the war: the aforementioned Thirteenth as well as the Fourteenth Amendment providing citizenship to the nearly four million African Americans who had been slaves, and the Fifteenth Amendment ensuring in theory that African Americans had the right to vote. [custom_adv] The war and its resolution led to a substantial increase in federal power aimed at reintegrating and rebuilding the South while guaranteeing the rights of the newly freed slaves.Reconstruction began in earnest following the war. [custom_adv] While President Lincoln attempted to foster friendship and forgiveness between the Union and the former Confederacy, an assassin's bullet on April 14, 1865, drove a wedge between North and South again. Republicans in the federal government made it their goal to oversee the rebuilding of the South and to ensure the rights of African Americans.