On this day
– Archduke Maximilian of Habsburg is proclaimed emperor of Mexico during the French intervention in Mexico.
– American Civil War: A day after his surrender to Union forces, Confederate General Robert E. Lee addresses his troops for the last time.
– At Arogee in Abyssinia, British and Indian forces defeat an army of Emperor Tewodros II. While 700 Ethiopians are killed and many more injured, only two British/ Indian troops die.
– The Titanic leaves port in Southampton, England for her only voyage.
– The Professional Golfers’ Association of America (PGA) is created in New York City.
– Mexican Revolution leader Emiliano Zapata is ambushed and shot dead by government forces in Morelos.
– The Great Gatsby by F. Scott Fitzgerald is first published in New York City, by Charles Scribner’s Sons.
– World War II: The Axis powers in Europe establish the Independent State of Croatia from occupied Yugoslavia with Ante Pavelić’s Ustaše fascist insurgents in power.
– Akihito, future Emperor of Japan, marries Michiko.
– 129 American sailors die when the submarine USS Thresher sinks at sea.
– Shipwreck of the New Zealand interisland ferry TEV Wahine at the mouth of Wellington Harbour.
– Vietnam War: For the first time since November 1967, American B-52 bombers reportedly begin bombing North Vietnam.
– Seventy-four nations sign the Biological Weapons Convention, the first multilateral disarmament treaty banning the production of biological weapons.
– A rare tropical storm develops in the South Atlantic Ocean near Angola; the first to be documented by satellites.
– Northern Ireland peace deal reached (Good Friday Agreement).