In 1966, Robert O’Neill, as a young officer in Vietnam, pioneered a unique approach to counter-insurgency operations by prioritizing winning hearts and minds over kill ratios. His experiences and letters to his wife were later compiled into the book Vietnam Task, contributing to the understanding of Australia's involvement in the Vietnam War.

A book edited by O'Neill in 1975 focusing on the strategic nuclear balance from an Australian perspective.

Robert J. O'Neill, the former United States Navy SEAL, TV news contributor, and author, was born on April 10, 1976 in Butte, Montana.

A book edited by O'Neill and D.M. Horner in 1981, exploring new directions in strategic thinking.

A book edited by O'Neill in 1984, focusing on security issues in East Asia.

A book edited by O'Neill in 1985, focusing on new technology and its impact on western security policy.

A book edited by O'Neill in 1986, delving into the topics of doctrine, alliance, and arms control.

A book edited by Robert O'Neill in 1987 focusing on the relationship between East Asia, the West, and international security.

A book edited by Robert O'Neill in 1988 discussing the prospects for security in the Mediterranean region.

A book edited by O'Neill and R.J. Vincent in 1990 as a collection of essays honoring J. D. B. Miller, focusing on the relationship between the West and the Third World.

A book edited by O'Neill and Beatrice Heuser in 1992 providing thoughts on securing peace in Europe post-World War II until 1962, relevant for the post-Cold War era.

In 1995, at the age of 19, Robert J. O'Neill joined the U.S. Navy with the aspiration of becoming a sniper.

Robert J. O'Neill enlisted in the United States Navy on January 29, 1996, and joined the Navy SEALs in the same year after expressing interest in becoming a sniper.

A book edited by O'Neill and John Baylis in 2000 exploring the role of nuclear weapons in the post-Cold War world.

In 2001, Robert J. O'Neill played a major role in the establishment of three new think tanks in Australia - the Lowy Institute, the Australian Strategic Policy Institute, and the United States Studies Centre.

In 2009, Robert J. O'Neill assisted in the rescue of Capt. Richard Phillips from Somali pirates, a hostage situation that was later depicted in the 2013 film 'Captain Phillips.'

Robert J. O'Neill was part of the mission to save Captain Richard Phillips during the Maersk Alabama hijacking in 2010.

Robert J. O'Neill claimed to have fired the head shots that killed Osama bin Laden during the raid on his Abbottabad compound on May 2, 2011.

In 2012, Robert J. O'Neill left the U.S. Navy after 16 years of service and 4 years shy of retirement. He is currently working as a public speaker for Leading Authorities.

In February 2013, Robert J. O'Neill was interviewed anonymously in an Esquire Magazine article. This interview preceded the public claims about his involvement in the mission to kill Osama bin Laden.

On October 5, 2014, claims were made that Robert J. O'Neill killed Osama bin Laden in anticipation of a Fox News special. These claims were expected to reveal his identity and details of the mission Operation Neptune Spear.

Rob O'Neill, a former member of the US Navy SEAL Team Six, was revealed as the individual who shot and killed Osama Bin Laden during the covert operation in Abbottabad, Pakistan.

In 2015, after claiming responsibility for killing Osama bin Laden, Robert J. O'Neill and his family were reportedly threatened by the Islamic State of Iraq and the Levant.

In 2016, a festschrift was dedicated to Robert O’Neill, recognizing his significant contributions to the fields of War, Strategy, and History. Throughout his career, O’Neill excelled in military operations, strategic studies, and military history, leaving a lasting impact on these interconnected areas.

In 2017, Robert J. O'Neill published a memoir titled 'The Operator' where he detailed some of his missions as a part of Navy SEAL Team 6. The book became a New York Times best seller.

On August 20, 2020, amid the COVID-19 pandemic, Robert J. O'Neill posted a controversial tweet with a selfie on a Delta Air Lines plane without a face mask, leading to his ban from the airline.

On October 14, 2020, US President Donald Trump retweeted a conspiracy theory suggesting Osama bin Laden was still alive and a body double was shot. Robert J. O'Neill, a supporter of Trump, responded to the theory on Twitter.

Robert J. O'Neill is a highly decorated combat veteran who served in various SEAL teams and participated in numerous combat missions across different regions. He has been honored with multiple awards, including Silver Stars and Bronze Stars for his gallantry and heroism in action. O'Neill is also known for his roles in high-profile operations such as the rescue of Marcus Luttrell and the mission to kill Osama bin Laden.

Robert O’Neill, a prominent figure in military operations, strategic studies, and military history, passed away in April 2023. His legacy includes pioneering counter-insurgency strategies and making valuable contributions to the understanding of warfare and history.

On August 23, 2023, Robert J. O'Neill was arrested in Frisco, Texas, on charges of assault causing bodily injury and public intoxication. He was taken to Collin County jail and released on a bond of $3,500.