The Regiment was authorized on September 16, 1776 in the Continental Army as Bigelow’s Regiment. It was assigned on February 9, 1777 to the Northern Department. Reassigned on March 13, 1777 from the Northern Department and assigned to the Highland’s Department. Organized in spring 1777 at Boston to consist of 8 companies from Berkshire, Bristol, Middlesex, Essex, Suffolk, Cumberland and Worcester Counties. It was assigned on June 12, 1777 to the 2nd Massachusetts Brigade, an element of the Highland’s Department. 2nd Massachusetts Brigade relieved on July 24, 1777 from the Highland’s Department and assigned to the Northern Department. 2nd Massachusetts Brigade relieved on November 7, 1777 from the Northern Department and assigned to the Main Continental Army. 2nd Massachusetts Brigade relieved on July 22, 1778 from the Main Continental Army and assigned to the Eastern Department. 2nd Massachusetts Brigade relieved on July 7, 1779 from the Eastern Department and assigned to the Highland’s Department. Re-designated on August 1, 1779 as the 15th Massachusetts Regiment. Reorganized on November 1, 1779 to consist of nine companies. Disbanded on January 1, 1781 at West Point, New York.