sentences:  Lincoln's 1863 Emancipation Proclamation freed about 20,000 of slaves in Confederate-held territory, and established emancipation as a Union war goal.In 1865, Lincoln was instrumental in the passage of the Thirteenth Amendment, which made slavery unconstitutional.Lincoln also presided over the passage of important domestic legislation, including the first of the Homestead Acts, the Morrill Land-Grant Act of 1862, and the Pacific Railroad Act of 1862.