May 10, 1849: When a theater rivalry turned deadly in Manhattan

On May 10, 1849, a theatrical rivalry turned violent when police and militia fired on a crowd of 10,000 at the Astor Opera House, killing 22–31 rioters in the deadliest civilian casualties since the Revolutionary War.

On May 10, 1849, a crowd of up to 10,000 gathered outside the Astor Opera House in Manhattan as a rivalry between American actor Edwin Forrest and British actor William Charles Macready escalated into violent civil unrest. The rivalry had become a proxy for class and national conflict, with working-class New Yorkers supporting Forrest and the Anglophile upper classes backing Macready.

When troops fired into the crowd, 22–31 people were killed and many more were injured, including civilians, police, and militia.

Mayor Caleb S. Woodhull called out the militia under Brig. Gen. Charles Sandford to respond to the violent crowd, which was throwing stones and resisting police. After warnings failed, troops fired into the crowd.

The Astor Opera House was destroyed and eventually became the New York Mercantile Library. The Academy of Music opened farther uptown as a venue for the upper classes. The event led to increased police militarization and more rigorous crowd-control training for officers, and contributed to a division between 'respectable' and 'working-class' entertainment in New York.

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May 10, 1849: When a theater rivalry turned deadly in Manhattan

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