May 19

• May 19, 1536
  Anne Boleyn, the second wife of England's King Henry VIII, being convicted of adultery and incest with her brother, Lord Rochford, is beheaded on Tower Green, the day before Henry VIII's marriage to Jane Seymour
• May 19, 1565
  The Turkish army of 40,000 men under Suleyman the Magnificent begin 5-month siege of the Knights of Malta, led by Grand Master Jean de la Valette with 2,500 troops at their garrison Fort Saint Elmo
• May 19, 1568
  Defeated by the Scottish Protestants and escaped to England, Queen of Scotland Mary is imprisoned by English Queen Elizabeth I, who perceives her as a threat
• May 19, 1608
  The Protestant states form the Evangelical Union of Lutherans and Calvinists under the direction of the elector of Brandenburg
• May 19, 1635
  Cardinal Richelieu of France declares war on the Hapsburgs in Spain and enters Thirty Years' War as an active combatant
• May 19, 1643
  A French army destroy Spanish army at the Battle at Rocroi in France during Thirty Years' War, which becomes the turning point of the perceived invincibility of the Spanish Empire
• May 19, 1643
  Delegates from four New England colonies, Massachusetts Bay, Plymouth, Connecticut and New Harbor, meet in Boston to form New England Confederation
• May 19, 1690
  English troops of William Phips conquer Port Royal in Acadia near Canada from the French, which becomes the first major engagement of King William's War
• May 19, 1749
  George II grants a charter to the Ohio Company to settle Ohio Valley
• May 19, 1792
  Russian army enters Poland
• May 19, 1793
  Netherlands captures French island of Saint Maarten
• May 19, 1798
  A French armada of 335 ships carrying nearly 40,000 men set sail for Alexandria, Egypt, which Napoleon plans to conquer
• May 19, 1919
  Turkish War of Independence begins between the Turkish nationalists and the proxies of the Allies, namely Greece on the Western front and Armenia on the Eastern
• May 19, 1919
  Mount Kelud in Indonesia erupts, boiling crater lake which breaks through crater wall killing 5,000 people in 104 small villages
• May 19, 1988
  Carlos Lehder, of Colombia's Medellín drug cartel, is convicted in Florida for smuggling more than three tons of cocaine into US
• May 19, 2010
  Protests in Bangkok, Thailand end with a bloody military crackdown, killing 91 and leaving more than 2,100 injured