American Civil War: Federal forces under Major General Philip Sheridan move to flank Confederate forces under Robert E. Lee as the Appomattox Campaign begins.
In Germany, Adolf Hitler receives 99% of the votes in a referendum to ratify Germany's illegal remilitarization and reoccupation of the Rhineland, receiving 44.5 million votes out of 45.5 million registered voters.
World War II: British Royal Navy and Royal Australian Navy forces defeat those of the Italian Regia Marina off the Peloponnesian coast of Greece in the Battle of Cape Matapan.