Final answer:
President Abraham Lincoln enjoyed the Union victory for only five days before being assassinated on April 14, 1865, by John Wilkes Booth at Ford's Theater.
Step-by-step explanation:
President Abraham Lincoln only had a very short period of time to enjoy the Union victory before his assassination. After Confederate General Robert E. Lee surrendered to Union General Ulysses S. Grant at Appomattox on April 9, 1865, which effectively ended the Civil War, President Lincoln would live to see just a few more days. He was assassinated by John Wilkes Booth on April 14, 1865, while attending a play at Ford's Theater, making the span between the Union victory and his assassination a mere five days. Lincoln's assassination came before he could see the final ratification of the Thirteenth Amendment and fully implement his postwar Reconstruction plans.