What is one important thing that Abraham Lincoln did?

Abraham Lincoln is a central figure in American history, and his contributions are significant and multifaceted. One pivotal action he took was signing the Emancipation Proclamation, which declared the freedom of all enslaved people in Confederate-held territory. This was a crucial step in the fight against slavery and shaped the course of the Civil War.

Additionally, Lincoln led the United States during the Civil War, a conflict that fundamentally tested the nation's survival and its commitment to the principles of liberty and equality. His leadership during this tumultuous period was vital for preserving the Union and eventually culminating in the abolition of slavery.

Moreover, the Gettysburg Address, delivered by Lincoln at the dedication of the Soldiers' National Cemetery, eloquently reinforced the principles of human equality and the purpose of the war. It has become one of the most quoted speeches in American history, reflecting Lincoln's values and vision for a unified nation.

Considering all these actions and their profound impact on the history of the United States, it is accurate to affirm that Lincoln's contributions include signing the Emancipation Proclamation, leading the country through the Civil War, and delivering the Gettysburg Address. This recognition emphasizes the importance of his leadership during a critical time in American history, making "All of the above