A plaque commemorating the Battle of Harlem Heights in the American Revolutionary War, which took place on September 16, 1776. The battle was won by Washington's troops. The plaque is located on the outside wall of Columbia University's Department of Mathematics building, at Broadway near where West 117th Street would be located. The plaque was erected by the Sons of the Revolution in the State of New York. The battle primarily took place around West 120th Street.