The Regiment was authorized on April 23, 1775 in the Massachusetts State Troops as John Brewer’s Regiment. Organized in spring 1775 at Cambridge to consist of 10 companies from Worcester, Hampshire, Middlesex, Suffolk, Bristol, Berkshire, and Barnstable Counties. Adopted on June 14, 1775 into the Continental Army and assigned to the Main Continental Army. It was assigned on July 22, 1775 to Greene’s Brigade, an element of the Main Continental Army. Consolidated on January 1, 1776 with Soul’s Company, Fellows’ Regiment and Danforth’s Company, David Brewer’s Regiment and consolidated unit re-designated as the 6th Continental Regiment, an element of Greene’s Brigade to consist of 8 companies. Reassigned on January 24, 1776 from Greene’s Brigade and assigned to Thomas’ Brigade, an element of the Main Continental Army. Consolidated (less 2 companies) 1 January 1777 with Bent’s and Whiting’s Companies, 24th Continental Regiment and consolidated unit re-designated as Wigglesworth’s Regiment, an element of the Northern Department, to consist of 8 companies; 2 companies concurrently consolidated with the 15th Continental Regiment. Reassigned on March 13, 1777 from the Northern Department and assigned to the Highland’s Department. It was assigned on June 12, 1777 to the 1st Massachusetts Brigade, an element of the Highland’s Department. Reorganized on April 1, 1779 to consist of 9 companies. 2nd Massachusetts Brigade relieved 7 July 7, 1779 from the Eastern Department and assigned to the Highland’s Department. Re-designated on August 1, 1779 as the 13th Massachusetts Regiment. Disbanded on January 1, 1781 at West Point, New York.