The trial of United States Army private Chelsea Manning for leaking classified material to WikiLeaks begins in Fort Meade, Maryland.

Chelsea Elizabeth Manning (born Bradley Edward Manning, December 17, 1987) is an American activist and whistleblower. She is a former United States Army soldier who was convicted by court-martial in July 2013 of violations of the Espionage Act and other offenses, after disclosing to WikiLeaks nearly 750,000 classified, or unclassified but sensitive, military and diplomatic documents. She was imprisoned from 2010 until 2017 when her sentence was commuted. A trans woman, Manning stated in 2013 that she had a female gender identity since childhood and wanted to be known as Chelsea Manning. She also expressed a desire to begin hormone replacement therapy.Assigned in 2009 to an Army unit in Iraq as an intelligence analyst, Manning had access to classified databases. In early 2010, she leaked classified information to WikiLeaks and confided this to Adrian Lamo, an online acquaintance. Lamo indirectly informed the Army's Criminal Investigation Command, and Manning was arrested in May that same year. The material included videos of the July 12, 2007, Baghdad airstrike and the 2009 Granai airstrike in Afghanistan; 251,287 U.S. diplomatic cables; and 482,832 Army reports that came to be known as the "Iraq War Logs" and "Afghan War Diary". The material was published by WikiLeaks and its media partners between April 2010 and April 2011.

Manning was charged with 22 offenses, including aiding the enemy, which was the most serious charge and could have resulted in a death sentence. She was held at the Marine Corps Brig, Quantico in Virginia, from July 2010 to April 2011, under Prevention of Injury statuswhich entailed de facto solitary confinement and other restrictions that caused domestic and international concernbefore being transferred to the Joint Regional Correctional Facility at Fort Leavenworth, Kansas, where she could interact with other detainees. She pleaded guilty in February 2013 to 10 of the charges. The trial on the remaining charges began on June 3, 2013, and on July 30, she was convicted of 17 of the original charges and amended versions of four others, but was acquitted of aiding the enemy. She was sentenced to 35 years at the maximum-security U.S. Disciplinary Barracks at Fort Leavenworth. On January 17, 2017, President Barack Obama commuted Manning's sentence to nearly seven years of confinement dating from her arrest in May 2010. After release, Manning earned a living through speaking engagements.In 2018, Manning challenged incumbent Senator Ben Cardin for the Democratic nomination for the United States Senate election in her home state of Maryland. Manning received 5.8% of the votes; Cardin won renomination with 80.4% of the votes cast. From March 8, 2019, to March 12, 2020 (except for a week from May 9 to 16), Manning was jailed for contempt and fined $256,000 for refusing to testify before a grand jury investigating WikiLeaks founder Julian Assange.

United States v. Manning was the court-martial of former United States Army Private First Class Bradley E. Manning, known now as Chelsea Manning.After serving in Iraq since October 2009, Manning was arrested in May 2010 after Adrian Lamo, a computer hacker in the United States, indirectly informed the Army's Criminal Investigation Command that Manning had acknowledged passing classified material to the whistleblower website, WikiLeaks. Manning was ultimately charged with 22 specified offenses, including communicating national defense information to an unauthorized source, and the most serious of the charges, aiding the enemy. Other charges included violations of the Espionage Act of 1917, stealing U.S. government property, charges under the Computer Fraud and Abuse Act of 1986 and charges related to the failure to obey lawful general orders under Article 92 of the Uniform Code of Military Justice. Manning entered guilty pleas to 10 of 22 specified offenses in February 2013.The trial on the 12 remaining charges began on June 3, 2013. It went to the judge on July 26, 2013, and findings were rendered on July 30. Manning was acquitted of the most serious charge, that of aiding the enemy, for giving secrets to WikiLeaks. In addition to five or six espionage counts, Manning was also found guilty of five theft specifications, two computer fraud specifications and multiple military infractions.On August 21, 2013, Manning was sentenced to 35 years' imprisonment, reduction in pay grade to E-1, forfeiture of all pay and allowances, and a dishonorable discharge. On January 17, 2017, President Barack Obama commuted Manning's sentence to a total of seven years' confinement. Manning was released on May 17, 2017. On May 31, 2018, the U.S. Army Court of Criminal Appeals upheld Manning's conviction of violating the Espionage Act of 1917.