Ulysses S. Grant was the 18th President of the United States, serving from 1869 to 1877. Before his presidency, he was a prominent general in the American Civil War, leading the Union Army to victory. His leadership was crucial in battles such as the Siege of Vicksburg and the Battle of Appomattox Court House, where he accepted the surrender of Confederate General Robert E. Lee. During his presidency, Grant focused on Reconstruction and civil rights for freed slaves. His administration passed the 15th Amendment, which aimed to protect voting rights. However, his time in office was also marked by political scandals and economic challenges, which affected his legacy.