History Events on May 18
Alonso de Ojeda sets sail from Cádiz on his voyage to what is now Venezuela.
#Alonso_de_Ojeda
Emperor Constantine the Great announces free distributions of food to the citizens in Constantinople.
#Constantine_the_Great
Rhode Island passes the first law in English-speaking North America making slavery illegal.
#Rhode_Island
World War I: The Selective Service Act of 1917 is passed, giving the President of the United States the power of conscription.
#World_War_I
Jackie Cochran becomes the first woman to break the sound barrier.
#Jacqueline_Cochran
First Crusade: Around 800 Jews are massacred in Worms, Germany.
#First_Crusade
Operation Passage to Freedom, the evacuation of 310,000 Vietnamese civilians, soldiers and non-Vietnamese members of the French Army from communist North Vietnam to South Vietnam following the end of the First Indochina War, ends.
#Operation_Passage_to_Freedom
Israeli troops finish withdrawing from the Gaza Strip, ceding the area to the Palestinian National Authority to govern.
#Gaza_Strip
Evangelist Aimee Semple McPherson disappears in Venice, California.
#Evangelism
Northern Somalia declares independence from the rest of Somalia as the Republic of Somaliland but is not recognized by the international community.
#Somalia
Aeroflot Flight 109 is hijacked mid-flight and the aircraft is subsequently destroyed when the hijacker's bomb explodes, killing all 82 people on board.
#Aeroflot_Flight_109
Apollo program: Apollo 10 is launched.
#Apollo_program
John Bellingham is found guilty and sentenced to death by hanging for the assassination of British Prime Minister Spencer Perceval.
#John_Bellingham
Nuclear weapons testing: Under project Smiling Buddha, India successfully detonates its first nuclear weapon becoming the sixth nation to do so.
#Nuclear_weapons_testing
New Deal: President Franklin D. Roosevelt signs an act creating the Tennessee Valley Authority.
#New_Deal
The first Indian film, Shree Pundalik by Dadasaheb Torne, is released in Mumbai.
#Cinema_of_India
The Seven Years' War begins when Great Britain declares war on France.
#Seven_Years'_War
A school shooting at Santa Fe High School in Texas kills 10 people.
#Santa_Fe_High_School_shooting
Louis II of Italy is crowned for the second time as Roman Emperor at Rome, at the age of 47. His first coronation was 28 years earlier, in 844, during the reign of his father Lothair I.
#Louis_II_of_Italy
World War II: Battle of Monte Cassino: Conclusion after seven days of the fourth battle as German paratroopers evacuate Monte Cassino.
#World_War_II
The Principality of Antioch, a crusader state, falls to the Mamluk Sultan Baibars in the Siege of Antioch.
#Principality_of_Antioch
The Great Siege of Malta begins, in which Ottoman forces attempt and fail to conquer Malta.
#Great_Siege_of_Malta
Israeli spy Eli Cohen is hanged in Damascus, Syria.
#Eli_Cohen
Abraham Lincoln wins the Republican Party presidential nomination over William H. Seward, who later becomes the United States Secretary of State.
#Abraham_Lincoln
The Disruption in Edinburgh of the Free Church of Scotland from the Church of Scotland.
#Disruption_of_1843
At least 78 people die in a landslide caused by heavy rains in the Colombian town of Salgar.
#2015_Colombian_landslide
Riots in Nørrebro, Copenhagen, caused by the approval of the four Danish exceptions in the Maastricht Treaty referendum. Police open fire against civilians for the first time since World War II and injure 11 demonstrators.
#Nørrebro
Deportation of Crimean Tatars by the Soviet Union government.
#Deportation_of_the_Crimean_Tatars
Napoleon Bonaparte is proclaimed Emperor of the French by the French Senate.
#Napoleon
In France, a modified TGV train achieves a new rail world speed record of 515.3 km/h (320.2 mph).
#TGV
A second photo from the Hubble Space Telescope confirms that Pluto has two additional moons, Nix and Hydra.
#Hubble_Space_Telescope
The First Legislative Yuan of the Republic of China officially convenes in Nanking.
#Legislative_Yuan
American Civil War: The Siege of Vicksburg begins.
#American_Civil_War
The Bath School disaster: Forty-five people, including many children, are killed by bombs planted by a disgruntled school-board member in Michigan.
#Bath_School_disaster
Mount St. Helens erupts in Washington, United States, killing 57 people and causing $3 billion in damage.
#Mount_St._Helens
Battle of Las Piedras: The first great military triumph of the revolution of the Río de la Plata in Uruguay led by José Artigas.
#Battle_of_Las_Piedras_(1811)
The future Henry II of England marries Eleanor of Aquitaine. He would become king 2 years later, after the death of his cousin once removed King Stephen of England.
#Henry_II_of_England
Napoleonic Wars: The United Kingdom revokes the Treaty of Amiens and declares war on France.
#Napoleonic_Wars
Battle of Tourcoing during the Flanders Campaign of the War of the First Coalition.
#Battle_of_Tourcoing