• Authorized on May 6, 1775 in the Rhode Island Army of Observation as Hitchcock's Regiment.
• Organized on May 8, 1775 to consist of 8 companies from Providence County.
• Adopted on June 14, 1775 into the Continental Army.
• Reorganized on June 28, 1775 to consist of 10 companies.
• Assigned on July 22, 1775 to Greene's Brigade, an element of the Main Continental Army.
• Reorganized and redesignated on January 1, 1776 as the 9th Continental Regiment, to consist of 8 companies.
• Greene's Brigade redesignated on August 12, 1776 as Nixon's Brigade.
• Nixon's Brigade redesignated on December 22, 1776 as Hitchcock's Brigade.
• Reorganized and redesignated on January 1, 1777 as the 2nd Rhode Island Regiment.
• Relieved on January 13, 1777 form Hitchcock's Brigade.
• Assigned on March 12, 1777 to the Highlands Department .
• Assigned on July 10, 1777 to the Rhode Island Brigade, an element of the Highlands Department .
• Rhode Island Brigade relieved on September 14, 1777 from the Highlands Department and assigned to the Main Continental Army.
• Relieved on July 19, 1778 from the Rhode Island Regiment and assigned to the 1st Massachusetts Brigade, an element of the Main Continental Army
• Relieved on July 21, 1778 from the 1st Massachusetts Brigade and assigned to the Rhode Island Brigade, an element of the Eastern Department.
• Reorganized on June 1, 1779 to consist of 9 companies.
• Relieved on November 17, 1779 from the Rhode Island Brigade and assigned to Stark's Brigade, an element of the Main Continental Army.
• Consolidated on January 1, 1781 with the 1st Rhode Island Regiment and redesignated as the Rhode Island Regiment.

Lineage taken from "The Continental Army" by Robert K Wright

• Siege of Boston
• New York City
• Trenton - Princeton
• Defense of Philadelphia
• Philadelphia - Monmouth
• Rhode Island
• New Jersey 1780

The 2nd Rhode Island Regiment also known as Hitchcock's Regiment was authorized on May 6, 1775 under Colonel Hitchcock in the Rhode Island Army of Observation and was organized on 8 May 1775 as eight companies of volunteers from Providence county of the colony of Rhode Island. The regiment was adopted into the Continental Army on 14 June 1775. The regiment was re-organized to ten companies on 28 June 1775 and assigned to Greene's Brigade on 22 July 1775. The regiment was re-organized and combined with the 1st Rhode Island Regiment to eight companies and redesignated as the 9th Continental Regiment on 1 January 1776. The regiment would see action at the Battle of Bunker Hill.