Columbine High School massacre

Quick Facts: Who was Columbine High School massacre?

Subject:

Columbine High School massacre

Known for:

The Columbine High School massacre was a devastating 1999 school shooting in Colorado.

Born:

1981-04-09

Died:

1999-04-20

Century / Era:

1981s Historical Era Archive

Verified Source:

2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

On April 20, 1999, high school senior students Eric Harris and Dylan Klebold shot and killed 13 students and one teacher in a school shooting and attempted bombing at Columbine High School in Columbine, Colorado, United States. Twenty people were injured by the gunfire, and three others were injured while trying to escape. The attack ended when Harris and Klebold committed suicide. The Columbine massacre was the deadliest mass shooting at a K–12 school in U.S. history until the Sandy Hook Elementary School shooting in December 2012. It was also the deadliest high school shooting until Parkland high school in 2018.

Pivotal Works & Achievements

Columbine is considered among the most infamous massacres in the United States, which as of June 2025, had inspired more than 70 copycat crimes, a phenomenon dubbed the Columbine effect, and Columbine has become a byword for modern school shootings. Harris and Klebold, who planned for roughly a year, intended the attack to be primarily a bombing and only secondarily a shooting. The pair launched a shooting attack after the homemade bombs they planted in the school failed to detonate. Their motive remains uncertain. The police were slow to enter the school and were strongly criticized for not intervening during the shooting.

Enduring Legacy & Impact

The incident resulted in the introduction of the immediate action rapid deployment (IARD) tactic, which is used in active-shooter situations, and an increased emphasis on school security with zero-tolerance policies. The violence sparked debates over American gun culture and gun control laws, high school cliques, subcultures (e.g. goths), outcasts, and school bullying, as well as teenage use of pharmaceutical antidepressants, the Internet, and violence in video games and film. Many makeshift memorials were created after the massacre, including ones using victim Rachel Scott's car and John Tomlin's truck. Fifteen crosses for the victims and the shooters were erected on top of a hill in Clement Park. Many people objected to the inclusion of crosses for the perpetrators and these were later removed from the site.

Chronological Milestones & Life Events

1. 1981 (1981-04-09): Birth of Columbine High School massacre — The Columbine High School massacre was a devastating 1999 school shooting in Colorado.
2. 1999 (1999-04-20): Passing & Historical Legacy — Columbine High School massacre passed away on 1999-04-20, leaving an enduring historical legacy.
3. 2012: 2012 Milestone — history until the Sandy Hook Elementary School shooting in December 2012.
4. 2018: 2018 Milestone — It was also the deadliest high school shooting until Parkland high school in 2018.
5. 2025: 2025 Milestone — Columbine is considered among the most infamous massacres in the United States, which as of June 2025, had inspired more than 70 copycat crimes, a phenomenon dubbed the Columbine effect, and Columbine has become a byword for modern school shootings.

Historical Fact-Check Quiz: Columbine High School massacre

True or False: “The initial plan for the attack at Columbine High School involved only a shooting, with bombing being a secondary measure.”

Answer (FALSE ❌): The perpetrators initially intended the attack to be primarily a bombing and only secondarily a shooting.

Contemporary Figures & Related Historical Timelines

• Abel Gance — Contemporary (Died in 1981) (1981): French cinematic pioneer, celebrated for his mastery of montage and epic filmmaking.
• Abigail Spencer — Contemporary (Born in 1981) (1981): American actress, producer, and writer known for roles in soap operas and dramas.
• Adriana Lima — Contemporary (Born in 1981) (1981): Iconic Brazilian model, celebrated for her long tenure as a Victoria's Secret Angel.
• Akhtar Hameed Khan — Contemporary (Died in 1999) (1999): Pioneering Pakistani social scientist and development practitioner.
• Akio Morita — Contemporary (Died in 1999) (1999): Visionary Japanese entrepreneur and co-founder of Sony.
• Alf Ramsey — Contemporary (Died in 1999) (1999): Legendary English footballer and manager, best known for the 1966 World Cup victory.
• A. H. M. Jones — Shared historical date (04-09 · Died) (1970): Pioneering British historian of classical antiquity, specializing in the later Roman Empire.
• Afrika Bambaataa — Shared historical date (04-09 · Died) (2026): Pioneering DJ and producer who shaped electro-funk and global hip-hop culture.
• 3rd Dalai Lama — Shared historical date (04-20 · Died) (1588): Founding figure of the Dalai Lama lineage, pivotal to Gelug school's rise in Tibet.
• Adolf Hitler — Shared historical date (04-20 · Born) (1889): Austrian-born German politician who became dictator of Germany during the Nazi era.
• 1981 Historical Timeline & Archive — Explore world events and figures from 1981
• April 9 (04-09) On This Day — Historical birthdays and events on April 9
• 1999 Historical Timeline & Archive — Explore world events and figures from 1999
• April 20 (04-20) On This Day — Historical events and memorials on April 20

Frequently Asked Questions about Columbine High School massacre