WikiLeaks is an organization that facilitates the anonymous leaking of secret information through its website.
It was founded in 2006 by Julian Assange, activist, computer programmer and hacker.
December 2007 - WikiLeaks posts the U.S. Army manual for soldiers dealing with prisoners at Camp Delta, Guantanamo Bay.
March 2008 - WikiLeaks posts internal documents from the Church of Scientology.
September 2008 - WikiLeaks posts emails from the Yahoo e-mail account of Sarah Palin.
November 2008 - WikiLeaks posts a list of names and addresses of people it claims belong to the far-right British National Party.
April 5, 2010 - A classified military video is posted by WikiLeaks. It shows a U.S. Apache helicopter firing on and killing two journalists and a number of Iraqi civilians in 2007. The military claimed that the helicopter crew believed the targets were armed insurgents, not civilians.
May 2010 - The U.S. military detains Pfc. Bradley Manning for allegedly leaking U.S. combat video, including the U.S. helicopter gunship attack posted on WikiLeaks, and classified State Department records. Manning was turned in by Adrian Lamo, a former hacker, who Manning confided in about leaking the classified records.
July 6, 2010 - The U.S. military announces it has charged Manning with violating army regulations by transferring classified information to a personal computer and adding unauthorized software to a classified computer system and of violating federal laws of governing the handling of classified information.
July 25, 2010 - WikiLeaks posts more than 90,000 classified documents relating to the Afghanistan war in what has been called the biggest leak since the Pentagon Papers during the Vietnam War. The documents are divided into more than 100 categories and touch on everything from the hunt for Osama bin Laden to Afghan civilian deaths resulting from U.S. military actions.
October 22, 2010 - WikiLeaks publishes nearly 400,000 classified military documents from the Iraq war, providing a new picture of how many Iraqi civilians have been killed, the role that Iran has played in supporting Iraqi militants and many accounts of abuse by Iraqi's army and police.
November 28, 2010 - WikiLeaks begins publishing approximately 250,000 leaked State Department cables dating back to 1966. The site says the documents will be released "in stages over the next few months."
November 28, 2010 - The WikiLeaks website suffers an attack designed to make it unavailable to users. A Twitter user who calls himself Jester claims responsibility for the attack.
November 30, 2010 - WikiLeaks comes under another electronic attack designed to make it unavailable to users, according to a Twitter post from WikiLeaks.
December 1, 2010 - Amazon removes WikiLeaks from its servers.
April 24, 2011 - Nearly 800 classified U.S. military documents obtained by WikiLeaks reveal details about the alleged terrorist activities of al Qaeda operatives captured and housed at the U.S. Navy's detention facility in Guantanamo Bay, Cuba.
September 2, 2011 - WikiLeaks releases its archive of more than 250,000 unredacted U.S. diplomatic cables.
October 24, 2011 - WikiLeaks announces that it is temporarily halting publication to "aggressively fundraise." Assange states that a financial blockade by Bank of America, VISA, MasterCard, PayPal and Western Union has cut off 95% of WikiLeaks' revenue.
December 16, 2011 - Bradley Manning's Article 32 hearing, the military equivalent of a grand jury hearing that will determine whether enough evidence exists to merit a court-martial, begins. Manning's attorney asks Lt. Col. Paul Almanza, the investigating officer, to recuse himself. Among the objections is that Almanza had a conflict of interest with his civilian job with the Justice Department, which is investigating WikiLeaks founder Julian Assange.
December 18, 2011 - Army investigator Special Agent David Shaver testifies that a search of military computers used by Pfc. Bradley Manning in Iraq revealed that he had downloaded the same secret documents and videos that were released online by WikiLeaks. In addition he mentioned finding on Manning's computer videos that also were leaked, with one showing a U.S. Apache helicopter attack that killed two Reuters journalists in Baghdad in 2007
February 23, 2012 - Bradley Manning is formally charged with aiding the enemy, wrongfully causing intelligence to be published on the Internet, transmitting national defense information, and theft of public property or records.
February 26, 2012 - WikiLeaks begins releasing what it says are five million e-mails from the private intelligence company Stratfor, starting with a company "glossary" that features unflattering descriptions of U.S. government agencies. The authenticity of the documents could not be independently confirmed.
April 24, 2012 - Manning appears in court before judge Col. Denise Lind to push for all charges against him to be dropped. His lawyers filed two motions the previous week - one pushes for all charges against Manning to be dismissed. If that fails, the second pushes for some charges to be dropped.
April 25, 2012 - Col. Lind denies both motions to dismiss charges against Manning.
June 19, 2012 - Facing extradition to Sweden on sexual assault charges, WikiLeaks founder Julian Assange requests political asylum at the Ecuadorian embassy in London.
July 5, 2012 - WikiLeaks begins publishing more than 2.4 million e-mails from Syrian politicians, government ministries and companies dating back to 2006.
June 3, 2013 - Pfc. Bradley Manning's court-martial begins.
July 30, 2013 - Manning is acquitted of aiding the enemy, but found guilty on 20 other counts, including violations of the Espionage Act.
August 21, 2013 - A military judge sentences Manning to 35 years -- less than the 60 prosecutors sought and far shorter than the 90 he could have received -- minus credit for the about three and a half years he's already been behind bars.
August 22, 2013 - Through a statement read on NBC's Today show, Manning announces he wants to live life as a woman, and wants to known by his new identity, Chelsea Manning.
April 23, 2014 - A Kansas judge grants Manning's request for a formal name change from Bradley to Chelsea.