• Authorized on April 23, 1775 in the Massachusetts State Troops as Phinney's Regiment.
• Organized in spring 1775 in Cumberland County to consist of 10 companies from Cumberland County.
• Adopted on June 14, 1775 into the Continental Army and assigned to the Main Continental Army.
• Assigned on July 22, 1775 to Heath's Brigade, an element of the Main Continental Army.
• Consolidated on January 1, 1776 with Scammon's Regiment and Watkin's Company, Peterson's Regiment and consolidated unit redesignated as the 18th Continental Regiment, to consist of 8 companies; an element of Heath's Brigade.
• Relieved on April 4, 1776 from Heath's Brigade and assigned to the Eastern Department.
• Relieved on August 3, 1776 from the Eastern Department and assigned to the Northern Department.
• Assigned on September 4, 1776 to Patterson's Brigade, an element of the Northern Department.
• Relieved on November 14, 1776 from Patterson's Brigade.
• Reorganized and redesignated (less 2 companies) on January 1, 1777 as Samuel Brewer's Regiment, an element of the Northern Department, to consist of 8 companies; 2 companies concurrently consolidated with the 15th Continental Regiment.
• Assigned on August 13, 1777 to the 3rd Massachusetts Brigade, an element of the Northern Department.
• 3rd Massachusetts Brigade relieved on October 27, 1777 from the Northern Department and assigned to the Main Continental Army.
• 3rd Massachusetts Brigade relieved on November 20, 1778 from the Main Continental Army and assigned to the Highland's Department.
• Reorganized on May 12, 1779 to consist of 9 companies.
• Redesignated on August 1, 1779 as the 12th Massachusetts Regiment.
• Relieved on November 14, 1779 from the 3rd Massachusetts Brigade and assigned to the 1st Massachusetts Brigade, an element of the Highland's Department.
• Disbanded on January 1, 1781 at West Point, New York.

ENGAGEMENTS