Answer:
The Civil War
Step-by-step explanation:
The amendment to end slavery in the United States was first proposed in 1864, in the midst of the Civil War and during an election year. Lincoln's power in politics was unclear, and the amendment failed to pass. Many people believed that passing a constitutional amendment in the middle of the war would only lead to more chaos, more division, and most likely an intensified conflict. However, the amendment eventually passed in 1865, becoming the Thirteenth Amendment to the Constitution.