On May 30:
70 Siege of Jerusalem: Titus and his Roman legions breached the Second Wall of Jerusalem. The Jewish defenders retreated to the First Wall. The Romans built a circumvallation, all trees within fifteen kilometres were cut down.
1434 Hussite Wars (Bohemian Wars): Battle of Lipany – effectively ending the war, Utraquist forces led by Diviš Bořek of Miletínek defeated and almost annihilated Taborite forces led by Prokop the Great.
1539 Hernando de Soto lands at Tampa Bay, Florida, with 600 soldiers with the goal of finding gold.
1588 The last ship of the Spanish Armada set sail from Lisbon heading for the English Channel.
1635 Thirty Years’ War: the Peace of Prague (1635) was signed.
1642 From this date all honours granted by Charles I were retrospectively annulled by Parliament.
1757 Henry Addington, 1st Viscount Sidmouth, Prime Minister of the United Kingdom, was born (d. 1844).
1814 Napoleonic Wars: War of the Sixth Coalition – the Treaty of Paris (1814) was signed returning French borders to their 1792 extent.
1832 The Rideau Canal in eastern Ontario opened.
1842 John Francis attempted to murder Queen Victoria as she drove down Constitution Hill with Prince Albert.
1846 Peter Carl Fabergé, Russian goldsmith and jeweller, was born (d. 1920).
1854 The Kansas-Nebraska Act became law establishing the US territories of Nebraska and Kansas.
1868 Decoration Day (the predecessor of the modern “Memorial Day) was observed in the United States for the first time (By “Commander-in-chief of the Grand Army of the Republic” John A. Logan‘s proclamation on May 5).
1871 The Paris Commune fell.
1876 Ottoman sultan Abd-ul-Aziz was deposed and succeeded by his nephew Murat V.
1883 A rumour that the Brooklyn Bridge was going to collapse causes a stampede that crushes twelve people.
1815 The East Indiaman ship Arniston was wrecked during a storm at Waenhuiskrans, the loss of 372 lives.
1917 Alexander I became king of Greece.
1922 In Washington, D.C. the Lincoln Memorial was dedicated.
1942 World War II: 1000 British bombers launched a 90-minute attack on Cologne, Germany.
1948 A dike along the flooding Columbia River broke, obliterating Vanport, Oregon within minutes. Fifteen people die and tens of thousands are left homeless.
1955 Topper Headon, British musician (The Clash), was born.
1958 Memorial Day: the remains of two unidentified American servicemen, killed in action during World War II and the Korean War respectively, were buried at the Tomb of the Unknown Soldier in Arlington National Cemetery.
1959 The Auckland Harbour Bridge, crossing the Waitemata Harbour was officially opened by Governor-General Lord Cobham.
1961 Long time Dominican dictator Rafael Trujillo was assassinated in Santo Domingo, Dominican Republic.
1963 A protest against pro-Catholic discrimination during the Buddhist crisis was held outside South Vietnam’s National Assembly, the first open demonstration during the eight-year rule of Ngo Dinh Diem.
1967 Daredevil Evel Knievel jumped his motorcycle over 16 cars lined up in a row.
1967 The Nigerian Eastern Region declared independence as the Republic of Biafra, sparking a civil war.
1971 Mariner 9 was launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars.
1972 The Angry Brigade went on trial over a series of 25 bombings throughout Britain.
1972 In Tel Aviv members of the Japanese Red Army carried out the Lod Airport Massacre, killing 24 people and injuring 78 others.
1989 Tiananmen Square protests of 1989: the 33-foot high “Goddess of Democracy” statue was unveiled in Tiananmen Square by student demonstrators.
1998 A magnitude 6.6 earthquake hit northern Afghanistan, killing up to 5,000.
Sourced from NZ History Online & WIkipedia