
The 26th Infantry Division was an infantry division of the United States Army. A major formation of the Massachusetts Army National Guard, it was based in Boston, Massachusetts for most of its history. Today, the division's heritage is carried on by the 26th Maneuver Enhancement Brigade.

The 26th Maneuver Enhancement Brigade ("Yankee") is a combat support brigade of the United States Army. Its headquarters is maintained by the Massachusetts Army National Guard. It draws its lineage from the Headquarters Company 26th Infantry Division.

The 126th Aviation Regiment is a unit of the U.S. Army National Guard.

The 103rd Field Artillery Regiment is a regiment of the United States Army. The only currently existing component is the 1st Battalion, 103rd Field Artillery Regiment, a unit of the Rhode Island National Guard. The regiment was originally constituted in 1917, but it descends from predecessor units dating back to 1801.

The 143d Airlift Squadron is a unit of the Rhode Island Air National Guard 143d Airlift Wing located at Quonset Point Air National Guard Station, Rhode Island. The 143d is equipped with the C-130J Hercules.
The 143d Airlift Wing is a unit of the Rhode Island Air National Guard, stationed at Quonset Point Air National Guard Station, Rhode Island. If activated to federal service, the Wing is gained by the United States Air Force Air Mobility Command.
The United States Air Force's 281st Combat Communications Group was a Rhode Island Air National Guard combat communications unit located in North Smithfield, Rhode Island, United States.

The 315th Cavalry Regiment was a cavalry unit of the United States Army during World War I and the interwar period. It was activated in early 1918 but broken up later that year to form new artillery units. The unit was recreated as a Rhode Island, Connecticut, Vermont, and Massachusetts Organized Reserve unit during the interwar period. It was disbanded after the United States entered World War II.

The 316th Cavalry Regiment was a cavalry unit of the United States Army during the interwar period. The unit was activated as a Rhode Island, Connecticut, Vermont, and New Hampshire Organized Reserve unit during the interwar period. It was converted into a signal aircraft warning regiment after the United States entered World War II.

The Harbor Defenses of Narragansett Bay was a United States Army Coast Artillery Corps harbor defense command. It coordinated the coast defenses of Narragansett Bay and Rhode Island from 1895 to 1950, beginning with the Endicott program. These included both coast artillery forts and underwater minefields. The command originated circa 1895 as an Artillery District, was renamed Coast Defenses of Narragansett Bay in 1913, and again renamed Harbor Defenses of Narragansett Bay in 1925.