The deadliest civilian riot in Manhattan up to 1849, it spurred police militarization in the United States following military suppression of a crowd.
Key Facts
- Date
- May 10, 1849
- Deaths
- 22 to 31 rioters
- Injured
- More than 120 people
- Location
- Astor Opera House, Manhattan
- Ostensible cause
- Rivalry between actors Edwin Forrest and William Charles Macready
By the Numbers
Location
Cause → Event → Consequence
Tensions between immigrant working-class New Yorkers and the city's wealthy elite, inflamed by a public rivalry between American actor Edwin Forrest and English actor William Charles Macready over their respective interpretations of Shakespearean roles, created a volatile atmosphere around Macready's performance at the Astor Opera House.
On May 10, 1849, a large crowd gathered outside and inside the Astor Opera House during Macready's performance. State militia opened fire on the rioters, killing between 22 and 31 people and injuring more than 120, making it the deadliest civil disturbance in Manhattan to that date and the largest military-caused civilian casualty event in the United States since the Revolutionary War.
The riot prompted significant changes in American law enforcement, including riot control training and the adoption of larger, heavier batons, marking a meaningful step toward the militarization of urban police forces. It also highlighted deep class and nativist divisions within New York City society.
Political Outcome
State militia suppressed the riot by force; 22–31 rioters killed, over 120 injured; led to increased police militarization including riot control training and heavier batons.
Urban policing largely unprepared for large-scale civil disturbances
Increased militarization of city police forces, with formalized riot control measures