On April 28:
1192 Assassination of Conrad of Montferrat (Conrad I), King of Jerusalem, in Tyre, two days after his title to the throne was confirmed by election.
1611 Establishment of the Pontifical and Royal University of Santo Tomas, The Catholic University of the Philippines, the largest Catholic university in the world.
1715 Franz Sparry, composer, was born (d. 1767).
1758 James Monroe, 5th President of the United States, was born. (d. 1831).
1792 France invaded the Austrian Netherlands (present day Belgium), beginning the French Revolutionary War.
1796 The Armistice of Cherasco was signed by Napoleon Bonaparte and Vittorio Amedeo III, the King of Sardinia, expanding French territory along the Mediterranean coast.
1862 American Civil War: Admiral David Farragut captured New Orleans.
1864 The assault of Gate Pa began.
1902 Using the ISO 8601 standard Year Zero definition for the Gregorian calendar preceded by the Julian calendar, the one billionth minute since the start of January 1, Year Zero occured at 10:40 AM on this date.
1912 Odette Sansom, French resistance worker, was born (d. 1995).
1916 Ferruccio Lamborghini, Italian automobile manufacturer, was born (d. 1993).
1920 Azerbaijan was added to the Soviet Union.
1922 Alistair MacLean, Scottish novelist, was born (d. 1987).
1926 Harper Lee, American author, was born.
1930 The first night game in organised baseball history took place in Independence, Kansas.
1932 A vaccine for yellow fever was announced for use on humans.
1937 – Saddam Hussein, President of Iraq, was born (d. 2006).
1941 Ann-Margret, Swedish-born actress, was born.
1948 Terry Pratchett, English author, was born.
1949 Former First Lady of the Philippines Aurora Quezon, 61, was assassinated while en route to dedicate a hospital in memory of her late husband; her daughter and 10 others are also killed.
1950 Jay Leno, American comedian and television host, was born.
1952 Occupied Japan: The United States occupation of Japan ended with the ratification of Treaty of San Francisco.
1952 The Sino-Japanese Peace Treaty (Treaty of Taipei) iwa signed in Taipei between Japan and the Republic of China to officially end the Second Sino-Japanese War.
1956 Jimmy Barnes, Scottish-born singer, was born.
1960 Ian Rankin, Scottish novelist, was born.
1965 United States troops landed in the Dominican Republic to “forestall establishment of a Communist dictatorship” and to evacuate U.S. Army troops.
1967 Expo 67 opened to the public in Montreal.
1969 Charles de Gaulle resigned as President of France.
1969 – Terence O’Neill announced his resignation as Prime Minister of Northern Ireland.
1970 Vietnam War: U.S. President Richard M. Nixon formally authorised American combat troops to fight communist sanctuaries in Cambodia.
1974 Penélope Cruz, Spanish actress, was born.
1978 President of Afghanistan, Mohammed Daoud Khan, was overthrown and assassinated in a coup led by pro-communist rebels.
1981 Jessica Alba, American actress, was born.
1986 The aircraft carrier USS Enterprise became the first nuclear-powered aircraft carrier to transit the Suez Canal, navigating from the Red Sea to the Mediterranean Sea to relieve the USS Coral Sea.
1987 American engineer Ben Linder was killed in an ambush by U.S. funded Contras in northern Nicaragua.
1988 Near Maui, Hawaii, flight attendant Clarabelle “C.B.” Lansing was blown out of Aloha Flight 243, a Boeing 737 and fell to her death when part of the plane’s fuselage rips open in mid-flight.
1994 Former C.I.A. official Aldrich Ames pleaded guilty to giving U.S. secrets to the Soviet Union and later Russia.
1996 Whitewater controversy: Bill Clinton gave a 4½ hour videotaped testimony for the defense.
1996 – In Tasmania Martin Bryant went on a shooting spree, killing 35 people and seriously injuring 21 more.
Sourced from NZ History Online & Wikipedia