The Battle of Chelsea Creek was the second military engagement of the Boston campaign of the American Revolutionary War. It is also known as the Battle of Noddle's Island, Battle of Hog Island and the Battle of the Chelsea Estuary. This battle was fought on May 27 and 28, 1775, on Chelsea Creek and on salt marshes, mudflats, and islands of Boston Harbor, northeast of the Boston peninsula. Most of these areas have since been united with the mainland by land reclamation and are now part of East Boston, Chelsea, Winthrop, and Revere.