How 9/11 Reshaped the Language and Logic of War

Twenty-five years after the September 11 attacks, the linguistic framework established to justify the US-led ‘war on terror’ continues to shape American politics and global security policy. Terms such as ‘enhanced interrogation,’ ‘enemy combatant,’ and ‘extraordinary rendition’ were introduced to sanitize violence and obscure the legal and moral implications of post-9/11 actions, experts argue.

The conflict, declared by President George W. Bush nine days after the attacks, was defined not by borders or a specific nation but by a tactic. Bush told Congress that the war would not end until every terrorist group of global reach was defeated, creating a perpetual conflict with no natural endpoint. This binary narrative divided the world into allies and enemies, ‘good’ and ‘evil,’ drawing on colonial constructs of civilization versus barbarism.

Christopher Baker-Beall of Bournemouth University noted that describing terrorism as a tactic rather than a state created a war without clear geographical boundaries. Harmonie Toros, a professor at the University of Reading, added that this language served to both sanitize US actions and demonize adversaries, leveraging fear and anger to justify measures that might otherwise be unacceptable in a functioning democracy.

The new vocabulary facilitated a sprawling network of covert operations and military interventions, including the invasions of Afghanistan and Iraq. Nearly 780 detainees passed through the Guantanamo Bay detention camp, where many were held for years without charge. British-American lawyer Clive Stafford Smith, one of the first attorneys granted access, described the facility as ‘born a sorry lie.’

Critical acts such as waterboarding, sleep deprivation, and stress positions were rebranded as ‘enhanced interrogation techniques,’ while the covert transfer of detainees was termed ‘extraordinary rendition.’ Legal memos known as the ‘Torture Memos’ provided a narrow interpretation of torture, offering a veneer of legality to abusive practices. Tahir Abbas of Aston University stated that this clinical language desensitized the public to the dehumanizing treatment of detainees, often innocent victims.

Domestically, the War on Gold Triggered Expanded Surveillance and Immigration Controls

Forty-five days after the attacks, Bush signed the Patriot Act, significantly expanding the US surveillance apparatus. The creation of the Department of Homeland Security in 2002 centralized agencies responsible for borders, immigration, and transport under a single national security structure. Policy shifted from responding to actual threats to governing potential future dangers, a move that Baker-Beall said widened the scope of security policy enormously.

This logic led to the normalization of suspicion, particularly within Muslim communities, who faced increased surveillance and securitization. Abbas described this as a ‘boomerang effect,’ where citizenship stripping and surveillance became routine, justifying state control based on potential rather than proven wrongdoing.

While President Barack Obama announced in 2013 that the ‘war on terrorism’ was over, the institutions and language persisted. ICE became a visible symbol of post-9/11 enforcement, and Guantanamo Bay was repurposed by the Trump administration to detain migrants. In 2025, Trump ordered the Department of Defense to adopt ‘Department of War’ as a secondary title, signaling a willingness to fight rather than merely defend.

Recent military actions in the Middle East have echoed pre-9/11 justifications. Trump’s claims that action against Iran was necessary to prevent nuclear development drew comparisons to the disputed weapons of mass destruction intelligence used before the Iraq War. Military strikes are again framed as ‘pre-emptive’ and ‘precision,’ with Iran labeled a ‘terror regime.’

Leonie Jackson of Northumbria University argued that while the specific terminology has evolved, the underlying ‘pre-emptive security logic’ remains familiar. ‘We may have moved away from the language of the war on terror, but its effects remain deeply ingrained in US society,’ she said, noting that the legacy includes a continued capacity to villainize specific groups as a tool of political discourse.