Abraham Lincoln : Abraham Lincoln16th President of the United States , serving from March 4 , 1861 until his assassination in April 1865 . Lincoln led the United States through its Civil War — its bloodiest war and its greatest moral , constitutional , and political crisis . In doing so , he preserved the Union , abolished slavery , strengthened the federal government , and modernized the economy
his assassination in April 1865
Assassination of Abraham Lincoln
Outline of Abraham Lincoln