Who Was the Biggest Traitor in American History?

When it comes to treachery and betrayal, history is rife with examples of individuals who have betrayed their country for personal gain, power, or ideology. From Benedict Arnold to Aldrich Ames, history is littered with infamous traitors who have caused significant damage to the United States.

But who was the biggest traitor in American history It’s a question that has been debated by historians and scholars for decades. In this article, we’ll explore some of the most infamous traitors in American history and try to answer this question.

Benedict Arnold – The Infamous Traitor

No list of American traitors would be complete without mentioning Benedict Arnold. A Revolutionary War hero turned traitor, Arnold conspired with the British to surrender West Point, a key fort on the Hudson River. His treachery was discovered before he could carry out his plan, and he fled to British lines where he was rewarded with a commission in the British army.

Arnold’s betrayal was a significant blow to the American cause, as West Point was a crucial stronghold that could have helped turn the tide of the war. His name has become synonymous with treason and is often used as an insult for those who betray their country.

Julius and Ethel Rosenberg – The Atomic Spies

During World War II, the United States was engaged in a race to develop an atomic bomb before Nazi Germany did. To aid in this effort, a group of scientists and engineers were brought together under what would become known as the Manhattan Project.

However, little did they know that two members of this team were Soviet spies – Julius and Ethel Rosenberg. The Rosenbergs passed on crucial information about nuclear weapons development to Soviet agents during the height of Cold War tensions between America and Russia.

Their actions were discovered by US authorities, and they were found guilty of espionage. Both were executed in 1953, becoming the only American civilians to be executed for espionage during the Cold War.

Robert Hanssen – The FBI Double Agent

Robert Hanssen was a former FBI agent who spied for the Soviet Union and later Russia for over 22 years. During this time, he passed on classified information about US intelligence and military operations, including the identities of American spies operating overseas.

Hanssen’s betrayal was discovered in 2001, and he was arrested and sentenced to life in prison without parole. His actions caused significant damage to American intelligence operations and compromised numerous agents’ safety.


So who was the biggest traitor in American history It’s difficult to say definitively as each of these individuals caused significant harm to the United States in their own way. Benedict Arnold’s betrayal had immediate consequences during a crucial time in the Revolutionary War, while the Rosenbergs’ actions compromised America’s nuclear weapons program during a time of heightened tensions with Russia.

However, if we had to choose one individual as the biggest traitor in American history, it would likely be Robert Hanssen. His prolonged espionage activities over two decades caused immense damage to US intelligence operations and put countless lives at risk.