• Authorized on April 23, 1775 in the Massachusetts State Troops as Gerrish's Regiment.
• Organized in spring 1775 at Cambridge to consist of 10 companies from Essex, Middlesex, Suffolk, and York Counties, Massachusetts, and Rockingham County, New Hampshire.
• 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.
• Reorganized and redesignated on January 1, 1776 as the 26th Continental Regiment, to consist of 8 companies; an element of Heath's Brigade.
• Relieved on August 12, 1776 from Heath's Brigade and assigned to Clinton's Brigade, an element of the Main Continental Army.
• Consolidated on January 1, 1777 with the 21st Continental Regiment and consolidated unit redesigned as Wesson's Regiment, to consist of 8 companies.
• Relieved on February 9, 1777 from Clinton's Brigade and assigned to the Northern Department.
• Assigned on August 13, 1777 to the 4th Massachusetts Brigade, an element of the Northern Department.
• 4th Massachusetts Brigade relieved on October 27, 1777 from the Northern Department and assigned to the Main Continental Army.
• 4th 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 9th Massachusetts Regiment.
• Relieved on January 1, 1781 from the 4th Massachusetts Brigade and assigned to the 3rd Massachusetts Brigade, an element of the Highland's Department.
• Disbanded on January 1, 1783 at West Point, New York.

ENGAGEMENTS