Who was the 16th president of the United States during the Civil War?

Abraham Lincoln served as the 16th president of the United States during the Civil War, which occurred from 1861 to 1865. His leadership during this tumultuous period was pivotal in preserving the Union and addressing the moral and social issues surrounding slavery. Lincoln issued the Emancipation Proclamation in 1863, which declared that all enslaved people in Confederate-held territory were to be set free, fundamentally altering the character of the war by making the abolition of slavery a central goal alongside preserving the Union.

Regarding the other individuals mentioned: Theodore Roosevelt, who served later in the early 20th century, was not involved in the Civil War era. Ulysses S. Grant, although a significant military leader during the war and later the 18th president, was not president during the conflict itself. James Buchanan was the 15th president, serving immediately before Lincoln, and his administration faced numerous challenges but did not encompass the Civil War period.