Lincoln tried to preserve the Union during the Civil War in several ways: 1) In his first inaugural address, he pledged there would be no war unless the South started it and that his goal was to preserve the Union and stop the spread of slavery, not necessarily end it. 2) He suspended habeas corpus in 1861 to arrest Confederate sympathizers and prevent rebellion. 3) He issued the Emancipation Proclamation in 1863, which freed all slaves in rebelling Confederate states and changed the purpose of the war to one of freeing slaves in addition to preserving the Union. 4) He called for a military draft in 1863 to bolster the Union army.