On June 24

Julia Gillard (pictured) was sworn in as the first female prime minister of Australia after incumbent Kevin Rudd declined to contest a leadership spill in the Labor Party.

John Isner defeated Nicolas Mahut at the Wimbledon Championships, concluding the longest match in tennis history, which lasted 11 hours and 5 minutes over three days.

Following the 1989 Tiananmen Square massacre the 13th Central Committee of the Chinese Communist Party appointed Jiang Zemin (pictured) as general secretary in place of Zhao Ziyang.

Amid racial tensions, U.S. Army military police shot and killed a black serviceman after a confrontation at a pub in Bamber Bridge, England.

Second World War: The British Army carried out Operation Collar, its first commando raid into German-occupied France.

The first of the Thai cultural mandates was issued, officially changing the country's name from Siam to Thailand.

The U.S. Navy's first two fast battleships, North Carolina and Washington, of the North Carolina class, were respectively ordered from the New York and Philadelphia Naval Shipyards.

A group of military officers and civilians engineered a bloodless coup in Siam, ending the absolute rule of the Chakri dynasty.

"O Canada", the present-day national anthem of Canada, was first performed in Quebec City during a Saint-Jean-Baptiste Day banquet.

Napoleonic Wars: Led by Napoleon, the French Grande Armée crossed the Neman, beginning their invasion of Russia.

On the Feast of St. John the Baptist, Bach led the first performance of Christ unser Herr zum Jordan kam, BWV 7, the third cantata of his chorale cantata cycle.

The first Grand Lodge of Freemasonry, the Premier Grand Lodge of England, was founded in London.

The 1559 Book of Common Prayer, a major component of the Elizabethan Religious Settlement, is legally introduced as the liturgy of the Church of England.

An outbreak of dancing mania, in which crowds of people danced themselves to exhaustion, began in Aachen (in present-day Germany) before spreading to other parts of Europe.

Hundred Years' War: The English fleet commanded by Edward III almost completely destroyed the French fleet at the Battle of Sluys.

In the decisive battle of the First War of Scottish Independence, Scottish forces led by Robert the Bruce defeated English troops under Edward II near Bannockburn, Scotland.

Western Roman emperor Glycerius, who was not recognized by his Eastern counterpart Leo I, was forced to abdicate.