42nd Infantry Division

42nd Infantry Division The 42nd Infantry Division, nicknamed the "Rainbow Division", is a formation of the United States Army National Guard with a lineage dating to World War I, later active in World War II, Kosovo, Iraq, and Afghanistan. The division has been commanded by leaders such as Douglas MacArthur and Harry J. Collins and includes units from multiple state National Guards and components of the United States Army Reserve. It is noted for its distinctive shoulder sleeve insignia and its role in major 20th- and 21st-century campaigns.

History

The division was organized during World War I from National Guard units drawn from multiple states to create a composite formation reflecting the concept of a "rainbow" over the nation. Early commanders included Adna R. Chaffee Jr. and actions in the Meuse-Argonne Offensive and the St. Mihiel Offensive connected the division to campaigns alongside the American Expeditionary Forces, General John J. Pershing, and Allied armies including the French Army and British Expeditionary Force. Between the wars the division deactivated and reorganized under the National Defense Act of 1920 and later mobilized for World War II; during that conflict units of the division participated in the Southern France campaign, advances through Alsace, and link-ups with Patton's Third Army elements and forces of the Free French Forces and Soviet Union at different phases. Postwar, the division returned to National Guard status with components from states including New York, New Jersey, Connecticut, Vermont, Rhode Island, and Massachusetts. In the 1990s and 2000s the division contributed formations to peacekeeping in Kosovo Force and to operations in Operation Iraqi Freedom, Operation Enduring Freedom, and stabilization missions tied to NATO and Coalition efforts.

Organization and Structure

The division is organized as a modular headquarters overseeing subordinate brigades, battalions, and support units drawn from multiple state National Guard organizations and aligned with active-duty counterparts. Typical subordinate elements have included an Infantry Brigade Combat Team, a Combat Aviation Brigade, a Sustainment Brigade, a Field Artillery Brigade, engineer battalions, military police battalions, and signal, intelligence, and medical battalions. The division headquarters integrates personnel with United States Army Reserve specialists and liaisons to United States European Command and United States Northern Command for domestic and overseas tasking. Staff sections employ doctrine from United States Army Combined Arms Doctrine and coordinate joint operations with United States Air Force assets, United States Navy detachments, and multinational partners such as NATO Response Force elements and host-nation militaries.

Combat Operations and Deployments

From its baptism of fire in World War I campaigns like the Meuse-Argonne Offensive to combat in World War II operations including the Southern France Campaign and the Rhineland Campaign, the division has participated alongside formations such as U.S. Seventh Army, U.S. Third Army, and Allied armies. In the late 20th century, the division provided headquarters and units for United Nations and NATO missions in the Balkans including deployments to Bosnia and Herzegovina and Kosovo, cooperating with forces from United Kingdom Armed Forces, French Armed Forces, German Army, and Italian Army. In the Global War on Terror the division mobilized brigades and support units for Operation Iraqi Freedom in Iraq and Operation Enduring Freedom in Afghanistan, interacting with commands like Multi-National Corps Iraq, Combined Joint Task Force 82, Coalition Provisional Authority, and provincial reconstruction teams. The division has also contributed to domestic operations under State Defense Forces coordination and Federal Emergency Management Agency support during natural disasters and homeland security missions alongside Department of Homeland Security entities.

Honors and Decorations

Elements of the division have received a variety of unit citations and campaign streamers reflecting service in major operations. Recognitions tied to World War I include campaign credits for the Meuse-Argonne Offensive and St. Mihiel Offensive. World War II honors encompass streamers for campaigns such as Southern France and Rhineland. Individual units earned decorations from the Distinguished Unit Citation system and foreign awards from allied governments including citations from the French government and decorations associated with NATO service. Soldiers and leaders from the division have been awarded decorations including the Distinguished Service Cross (United States), the Silver Star, the Bronze Star Medal, the Purple Heart, and foreign honors such as the Croix de Guerre (France) for actions in combined operations with Allied forces.

Insignia and Traditions

The division's shoulder sleeve insignia — a multicolored arc reminiscent of a rainbow — symbolizes the unit's original composition from National Guard units across many states and the aspiration to span the nation. Traditions include the use of the nickname "Rainbow Division", regimental histories maintained by constituent infantry and artillery units, memorials such as the division monument at the Meuse-Argonne American Cemetery and participation in anniversary ceremonies linked to Veterans Day and Armistice Day. Unit ceremonies reference leaders like Douglas MacArthur and Harry J. Collins and maintain heraldry conforming to United States Army Institute of Heraldry standards, while contemporary formations preserve lineage through unit decorations, campaign streamers, and affiliation with state National Guards including New York Army National Guard and New Jersey National Guard.

Category:Infantry divisions of the United States Army Category:United States Army divisions of World War I Category:United States Army divisions of World War II