The Battle of Brooklyn was the college sports rivalry between Long Island University and St. Francis College. The LIU Sharks and SFBK Terriers were both in the Northeast Conference and competed against each other in various sports. The Battle of Brooklyn was a fierce rivalry, which originated in men's basketball; while the two schools are rivals in all sports that both schools sponsor, the "Battle of Brooklyn" name is currently applied only to matchups in men's and women's basketball and men's soccer. The intensity of the rivalry was augmented by the proximity of the two universities, located less than a half-mile apart in Downtown Brooklyn. The name of the rivalry is in reference to the first major battle of the American Revolutionary War, the Battle of Brooklyn.

The St. Francis Brooklyn Terriers were the 21 teams that represented St. Francis College in athletics. The Terriers were members of NCAA Division I and participated in the Northeast Conference (NEC) except in two sports that the NEC does not sponsor—men's and women's water polo. The water polo teams respectively competed in the Collegiate Water Polo Association and the Metro Atlantic Athletic Conference.