July 18

• July 18, 390 BC
  Gauls decisively defeat Roman forces and inflict heavy casualties on Romans at the battle of Allia
• July 18, 1858
  The summer Great Stink takes place when the smell of untreated sewage almost overwhelmed people in central London, England
• July 18, 1872
  Britain introduced the Ballot Act for voting by secret ballot
• July 18, 1925
  Mein Kampf, an autobiographical manifesto outlining future plans for Germany, is published by Nazi leader Adolf Hitler
• July 18, 1936
  General Francisco Franco leads uprising in Spanish Morocco starting Spanish Civil War between Republican, loyal to the democratic Spanish Republic, and Nationalist forces backed by Nazi Germany and Fascist Italy
• July 18, 1995
  Eruption of Soufrière Hills volcano in the southern part of Montserrat, a British overseas territory in the Caribbean, destroys Montserrat's capital city of Plymouth and leads to emigration of two-thirds of the island's population
• July 18, 2003
  Second Congo War ends with more than 5 million dead

June 21

• June 21, 217 BC
  Roman army is ambushed and destroyed by Hannibal's army, numbering around 55,000 troops, at the Battle of Lake Trasimene, which becomes the largest ambush in military history
• June 21, 1377
  Edward III, King of England, dies
• June 21, 1547
  The great fire in Moscow destroys sections of Moscow which had been built almost entirely of wood including some building in the Kremlin
• June 21, 1607
  The Church of England Episcopal Church, the first Protestant Episcopal parish in America, is established at Jamestown
• June 21, 1661
  Sweden signs the Treaty of Cardis, in which Russia agrees to return to Sweden areas it had conquered in the Baltic lands
• June 21, 1675
  Sir Christopher Wren begins to rebuild St Paul's Cathedral in London, replacing the old building which has been destroyed by the Great fire
• June 21, 1749
  English transport ships land 2576 colonists on what is now Nova Scotia to establish a British military base, naming the town Halifax
• June 21, 1788
  New Hampshire ratifies the United States Constitution as the ninth state, and by the terms of Article VII it is in effect
• June 21, 1834
  Obed Hussey, an American inventor, patents mechanical reaping machine
• June 21, 1887
  Britain celebrates the golden jubilee of Queen Victoria
• June 21, 1893
  George Washington Gale Ferris, engineer, completes the construction of a 77-meter high revolving steel wheel with 38 passenger cars, each with 40 plush chairs, for the World's Columbian Exposition in Chicago, the first Ferris wheel
• June 21, 1897
  In Austria a giant Ferris wheel, designed by Walter Bassett of England, is opened in Vienna to commemorate the 50th anniversary of the accession of Emperor Franz Joseph to the Habsburg throne
• June 22, 1940
  After German blitz France formally surrenders at the signing ceremony, held in the same wagon-lit railroad car used by French Marshal Ferdinand Foch to accept the surrender of Germany in 1918
• June 21, 1948
  In a lab in Manchester, England, the Small Scale Experimental Machine computer, nicknamed "Baby" is created, the first to contain memory (128 bytes) which could store a program
• June 21, 1985
  It is confirmed by American, German, and Brazilian forensic pathologists that the body exhumed in Brazil on June 6 is, indeed, that of the German physician in Auschwitz concentration camp, Josef Mengele

March 15

• March 15, 44 BC
  Julius Caesar, dictator of the Roman Republic, is assassinated by a group of senators led by Marcus Junius Brutus in the Portico of the Theater of Pompey
• March 15, 493
  Odoacer, a Germanic soldier and the first King of Italy, is murdered by king of the Germanic Ostrogoths Theoderic while they shared a meal
• March 15, 933
  Henry the Fowler, King of East Francis, routes the raiding Magyars at the Battle of Riade
• March 15, 1493
  Christopher Columbus returns to Spain after first new world voyage
• March 15, 1672
  King Charles II enacts Royal Declaration of Indulgence suspending the execution of the penal laws that punished recusants from the Church of England
• March 15, 1697
  Hannah Duston, a 40-year-old colonial Massachusetts Puritan woman, in what is now New Hampshire is attacked and captured by 12 Indians who kills her daughter
• March 15, 1781
  British suffer heavy losses at the Battle of Guilford Court House, South Carolina
• March 15, 1848
  In Hungary an uprising against Habsburg rule begins in front of the national museum in Budapest
• March 15, 1867
  The Austro-Hungarian Compromise establishes of the dual monarchy known as Austria-Hungary, with separate parliaments and prime ministers in the regions and a single head of state
• March 15, 1906
  British Charles Rolls and Henry Royce form Rolls Royce Ltd., a car-manufacturing company
• March 15, 1907
  Finland becomes first European country to give women the right to vote
• March 15, 1915
  In response to the attack on Columbus, President U.S. President Woodrow Wilson orders General John J. Pershing to proceed into Mexico with over 5,000 men to capture or kill Mexican revolutionary Francisco "Pancho" Villa
• March 15, 1917
  Russian Czar Nicholas II abdicates the throne in his royal train going towards Petrograd, as a result of the February Revolution, bringing an end to the czarist autocracy in Russia
• March 15, 1939
  German troops enter Prague, the capital of Czechoslovakia, after which Adolf Hitler proclaims from Prague Castle Bohemia and Moravia a German protectorate
• March 15, 1969
  Hundreds die during violent Chinese-Russian border dispute
• March 15, 1986
  Funeral services are held for Swedish Prime Minister Olaf Palme, murdered by an assailant on a street in Stockholm
• March 15, 1988
  NASA reports accelerated breakdown of ozone layer by chlorofluorocarbons
• March 15, 1990
  Mikhail Gorbachev is elected as the first executive president of the Soviet Union
• March 15, 1994
  U.S. troops are withdrawn from Somalia
• March 15, 2003
  In Bangui, Central African Republic, ex-chief of army General François Bozizé and 1000 troops stage a military coup against President Ange-Felix Patassé, Ange-Félix Patassé