HistoryData
war2013

Boston Marathon bombings — 2013 terrorist event in Boston, Massachusetts, U.S.

April 15, 2013

The 2013 Boston Marathon bombing killed 3 and injured hundreds, leading to a landmark domestic terrorism prosecution and Supreme Court death penalty ruling.

Quick Facts

Year
2013
Category
war

Key Facts

Date
April 15, 2013
Deaths
3 (plus 1 officer died later)
Injured
Hundreds, including 12 who lost limbs
Perpetrators
Tamerlan and Dzhokhar Tsarnaev
Charges (Dzhokhar)
30, including use of weapon of mass destruction
Supreme Court ruling
Death sentence upheld, March 4, 2022

By the Numbers

152,013
Date
3
Deaths
12
Injured
30
Charges (Dzhokhar)

Location

Map of Boston, United StatesMap of Boston, United StatesBoston, United States

Cause → Event → Consequence

Cause

Brothers Tamerlan and Dzhokhar Tsarnaev, self-radicalized by Islamist extremism and motivated by U.S. wars in Iraq and Afghanistan, constructed improvised pressure cooker bombs using instructions from al-Qaeda in the Arabian Peninsula's online magazine, with no direct ties to outside terrorist organizations.

Event

During the 117th Boston Marathon on April 15, 2013, the Tsarnaev brothers detonated two homemade pressure cooker bombs near the finish line, killing three people and injuring hundreds. A subsequent manhunt ended with Tamerlan killed during a Watertown shootout and Dzhokhar captured hiding in a boat on April 19.

Consequence

Dzhokhar Tsarnaev was convicted on 30 charges and sentenced to death; the sentence was initially vacated by the First Circuit Court of Appeals but ultimately upheld by the U.S. Supreme Court in United States v. Tsarnaev on March 4, 2022, setting a significant precedent for terrorism-related capital punishment cases.

Belligerents & Mobilization Analysis

Side A

1 belligerent

Tamerlan and Dzhokhar Tsarnaev (perpetrators)
Peak Mobilized Forces2
Estimated Casualties1
Casualty Rate50.0%
Forces vs Casualties ratio
0CasualtiesMobilized
Key Commanders

Tamerlan Tsarnaev, Dzhokhar Tsarnaev.

Side B

1 belligerent

United States law enforcement and civilians
Estimated Casualties4
Outcome
Perpetrators neutralized; Dzhokhar Tsarnaev convicted and sentenced to death, upheld by the Supreme Court in 2022.

Timeline Context

Timeline around 20132013201020112012201420152016Eurovision Song Contest 2013 — 58th Eurovision Song ContestJanuary 2013 — month of 20132013 Formula One World Championship (FIA) — 64th season of Formula One motor racing2013 Africa Cup of Nations — football championship of Africa2013 World Championships in Athletics — 2013 edition of the World Championships in Athletics2013–14 UEFA Europa League — 43rd season of Europe's secondary club football tournament organised by UEFAJunior Eurovision Song Contest 2013 — 11th annual Junior Eurovision Song ContestFIBA EuroBasket 2013 — 2013 edition of the FIBA EuroBasketboston-marathon-bombings-2013-terrorist-event-in-boston-m-2013