What was one important thing that Abraham Lincoln did?
He was the first President of the United States
He led the United States during World War I
He freed the slaves with the Emancipation Proclamation✓Bonne réponse
He wrote the Declaration of Independence
Réponse officielle
freed the slaves (Emancipation Proclamation)
saved (or preserved) the Union
led the United States during the Civil War
Explication
Lincoln issued the Emancipation Proclamation, held the Union together and led the country through the Civil War. The other achievements belong to Jefferson, Washington and Wilson.