1776 The Battle of Long Island: in what is now Brooklyn, New York, British forces under General William Howe defeat Americans under General George Washington.
1845 The Cobble Hill Tunnel in Brooklyn is completed.
1876 Brooklyn Theater Fire kills at least 278 people in Brooklyn, NY.
1898 New York City annexes land from surrounding counties, creating the City of Greater New York. The four initial boroughs, Manhattan, Brooklyn, Queens, and The Bronx, are joined on January 25 by Staten Island to create the modern city of five boroughs.
1918 Malbone Street Wreck: the worst rapid transit accident in US history occurs under the intersection of Malbone Street and Flatbush Avenue, Brooklyn, New York City, with at least 93 deaths.
1971 New York Police Officer Frank Serpico is shot during a drug bust in Brooklyn and survives to later testify against police corruption. Many believe the incident proves that NYPD officers tried to kill him.