Abraham Lincoln did many amazing things during his presidency. One major thing was that he abolished slavery in the United States, and was the president during the Civil War from 1861 to 1865. In addition, he reunited the Union and the Confederate States after the war. He also delivered many famous speeches, such as the Gettysburg Address.
You could probably research some more facts about him because he did a lot more, but these are the major things. Hope this helped :-)