As Ulysses S. Grant extends his lines east of Richmond, Phil Sheridan's cavalry, along with some infantry support, come in contact with the Confederate right flank at Dinwiddie Court House.
15th Amendment to the Constitution is adopted. It states that no state shall deprive any citizen of the right to vote because of race, color, or previous condition of servitude.
After withdrawing from New Madrid Confederates control Island No. 10, blocking shipping on the Mississippi. Over 5,000 Confederate soldiers on the island surrender to Major General John Pope on April 8.