The story of the 8th Cavalry Regiment began on July 28, 1866, when it was constituted by an Act of Congress to secure the expanding American frontier. Officially organized at Camp Reynolds on Angel Island, California, the regiment was largely composed of veterans from the Civil War and frontiersmen who had moved west during the Gold Rush. The early years of the 8th Cavalry were defined by the arduous demands of the Indian Wars. From 1867 to 1888, the regiment operated across Nevada, Oregon, Arizona, New Mexico, and Texas, engaging in numerous campaigns to protect settlers, secure trade routes, and establish federal control. In 1890, elements of the regiment participated in the final major campaigns of the era, including movements related to the Ghost Dance War in South Dakota.

Throughout the 20th century, the 8th Cavalry underwent significant transformations. Although it did not deploy to Europe during World War I—being engaged instead in the Punitive Expedition in Mexico—the regiment saw extensive action in subsequent global conflicts. During World War II, the cavalry transitioned from a horse-mounted force to a dismounted infantry role. The regiment fought valiantly in the Pacific Theater, and later played a critical role in the Korean War, where it participated in the first amphibious landing of the conflict and the subsequent defense of the Pusan Perimeter. During the Cold War and Vietnam eras, the structure of the regiment evolved rapidly. While some elements were converted to airmobile infantry to fight in the jungles of Vietnam, other battalions were stationed in West Germany as an armored deterrent against potential Soviet incursions. It was during these decades of rapid technological shift that the 8th Cavalry transitioned into the mechanized force recognizable today.

In the modern era, the 6th Squadron, 8th Cavalry Regiment carved out its own distinct operational history during the Global War on Terror. Operating as a reconnaissance and security force, the Mustang Squadron deployed to Iraq in support of Operation Iraqi Freedom. Stationed at Forward Operating Base Falcon, the squadron conducted vital route clearance and security patrols. Notably, the 6th Squadron was later tasked with standing up and training the 5th Iraqi Army Brigade. Operating out of FOB Honor, the Mustangs mentored Iraqi security forces and subsequently partnered with them to secure the critical Airport Road in Baghdad, a vital artery for coalition logistics and personnel.

Today, the 6th Squadron, 8th Cavalry Regiment remains at the tip of the spear as the reconnaissance squadron for the 2nd ABCT, 3rd Infantry Division at Fort Stewart, Georgia. In 2022, the Mustang Squadron achieved a significant milestone by becoming one of the most modernized and lethal cavalry squadrons in the United States Army. The unit integrated state-of-the-art Abrams M1A2 SEPv3 tanks and M2A4 Bradley Fighting Vehicles into its formations, ensuring its readiness to conduct rapid, large-scale combat operations against near-peer adversaries.

From the rugged trails of the 19th-century American Southwest to the urban centers of modern Iraq and the high-tech training grounds of Fort Stewart, the 6th Squadron, 8th Cavalry Regiment has continually adapted to the changing character of war. Carrying forward the regimental motto of "Honor and Courage," the Mustangs remain a vital component of the United States Army's armored force, ready to deploy, fight, and win in defense of the nation