18 March Events

March 18 is the 77th day of the year (78th in leap years) in the Gregorian calendar. There are 288 days remaining until the end of the year. This date is slightly more likely to fall on a Wednesday, Friday or Sunday (58 in 400 years each) than on Monday or Tuesday (57), and slightly less likely to occur on a Thursday or Saturday (56).
Events

AD 37 – The Roman Senate annuls Tiberius's will and proclaims Caligula emperor.
633 – Ridda wars: The Arabian Peninsula is united under the central authority of Caliph Abu Bakr.
1068 – An earthquake affects the Levant and the Arabian Peninsula, leaving up to 20,000 dead.
1229 – Frederick II, Holy Roman Emperor, declares himself King of Jerusalem in the Sixth Crusade.
1241 – First Mongol invasion of Poland: Mongols overwhelm Polish armies in Kraków in the Battle of Chmielnik and plunder the city.
1314 – Jacques de Molay, the 23rd and final Grand Master of the Knights Templar, is burned at the stake.
1438 – Albert II of Habsburg becomes Holy Roman Emperor.
1608 – Susenyos is formally crowned Emperor of Ethiopia.
1644 – The Third Anglo-Powhatan War begins in the Colony of Virginia.
1741 – New York governor George Clarke's complex at Fort George is burned in an arson attack, starting the New York Conspiracy of 1741.
1766 – American Revolution: The British Parliament repeals the Stamp Act.
1793 – The first modern republic in Germany, the Republic of Mainz, is declared by Andreas Joseph Hofmann.
1793 – Flanders Campaign of the French Revolution, Battle of Neerwinden.
1834 – Six farm labourers from Tolpuddle, Dorset, England are sentenced to be transported to Australia for forming a trade union.
1848 – March Revolution: In Berlin there is a struggle between citizens and military, costing about 300 lives.
1850 – American Express is founded by Henry Wells and William Fargo.
1865 – American Civil War: The Congress of the Confederate States adjourns for the last time.
1871 – Declaration of the Paris Commune; President of the French Republic, Adolphe Thiers, orders the evacuation of Paris.
1874 – Hawaii signs a treaty with the United States granting exclusive trade rights.
1892 – Former Governor General Lord Stanley pledges to donate a silver challenge cup, later named after him, as an award for the best hockey team in Canada the Stanley Cup.
1913 – King George I of Greece is assassinated in the recently liberated city of Thessaloniki.
1915 – World War I: During the Battle of Gallipoli, three battleships are sunk during a failed British and French naval attack on the Dardanelles.
1921 – The second Peace of Riga is signed between Poland and the Soviet Union.
1922 – In India, Mohandas Gandhi is sentenced to six years in prison for civil disobedience, of which he serves only two.
1925 – The Tri-State Tornado hits the Midwestern states of Missouri, Illinois, and Indiana, killing 695 people.
1937 – The New London School explosion in New London, Texas, kills 300 people, mostly children.
1937 – Spanish Civil War: Spanish Republican forces defeat the Italians at the Battle of Guadalajara.
1938 – Mexico creates Pemex by expropriating all foreign-owned oil reserves and facilities.
1940 – World War II: Adolf Hitler and Benito Mussolini meet at the Brenner Pass in the Alps and agree to form an alliance against France and the United Kingdom.
1942 – The War Relocation Authority is established in the United States to take Japanese Americans into custody.
1944 – The eruption of Mount Vesuvius in Italy kills 26 people and causes thousands to flee their homes.
1948 – Soviet consultants leave Yugoslavia in the first sign of the Tito–Stalin Split.
1953 – An earthquake hits western Turkey, killing 265 people.
1959 – The Hawaii Admission Act is signed into law.
1962 – The Évian Accords end the Algerian War of Independence, which had begun in 1954.
1965 – Cosmonaut Alexey Leonov, leaving his spacecraft Voskhod 2 for 12 minutes, becomes the first person to walk in space.
1967 – The supertanker Torrey Canyon runs aground off the Cornish coast.
1968 – Gold standard: The U.S. Congress repeals the requirement for a gold reserve to back US currency.
1969 – The United States begins secretly bombing the Sihanouk Trail in Cambodia, used by communist forces to infiltrate South Vietnam.
1970 – Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
1971 – Peru: a landslide crashes into Yanawayin Lake, killing 200 people at the mining camp of Chungar.
1980 – A Vostok-2M rocket at Plesetsk Cosmodrome Site 43 explodes during a fueling operation, killing 48 people.
1990 – Germans in the German Democratic Republic vote in the first democratic elections in the former communist dictatorship.
1990 – In the largest art theft in US history, 12 paintings, collectively worth around $300 million, are stolen from the Isabella Stewart Gardner Museum in Boston.
1994 – Bosnia's Bosniaks and Croats sign the Washington Agreement, ending war between the Croatian Republic of Herzeg-Bosnia and the Republic of Bosnia and Herzegovina, and establishing the Federation of Bosnia and Herzegovina.
1996 – A nightclub fire in Quezon City, Philippines kills 162 people.
1997 – The tail of a Russian Antonov An-24 charter plane breaks off while en route to Turkey causing the plane to crash and killing all 50 people on board.
2014 – The parliaments of Russia and Crimea sign an accession treaty.
2015 – The Bardo National Museum in Tunisia is attacked by gunmen. 23 people, almost all tourists, are killed, and at least 50 other people are wounded.
Holidays and observances

Christian feast day:
Alexander of Jerusalem
Cyril of Jerusalem
Edward the Martyr
Fridianus
Salvator
March 18 (Eastern Orthodox liturgics)
Earliest date on which Holy Wednesday can fall, while April 21 is the latest; celebrated on the week before Easter. (Christianity)
Anniversary of the Oil Expropriation (Mexico)
Flag Day (Aruba)
Gallipoli Memorial Day (Turkey)
Men's and Soldiers' Day (Mongolia)
Teacher's Day (Syria)

Source: Wikipedia