The 1st Squadron, 11th Armored Cavalry Regiment, "Ironhorse," has a long, proud history of excellence that spans more than a century and includes military campaigns in the Philippines, Mexico, Europe, Vietnam, Kuwait, Afghanistan and Iraq. The Regimental Motto, "Allons," means "Let's Go," and the 1st Squadron has been on the go since February 2, 1901 when it was activated as a horse squadron at .
Commanded by Lieutenant Colonel Hennisse, the approximately 400 men of the Squadron trained nine months before becoming the first squadron to leave for the Regiment's inaugural deployment to the . Arriving in January 1902, Troops A and D patrolled , where they fought the Regiment's first engagement.
In 1905, the Regiment relocated to . In 1906, the 1st Squadron remained in while the rest of the Regiment deployed to as part of President Roosevelt's Army of Pacification. In 1909, the 1st Squadron rejoined the rest of the Regiment at .
On March 12, 1916 the Troopers of the Regiment received orders to join General John J. Pershing as part of the Punitive Expedition in to pursue Pancho Villa. Nine days later, the 1st Squadron led the way, arriving in on March 21, 1916. Later, the 1st Squadron proved its mettle by riding 22 hours straight to the rescue of forces besieged in Parral.
The 11th ACR was not deployed during World War I. During this period, 1st Squadron conducted port operations in . After the Armistice in 1918 the Regiment, with its predominantly black horses, was stationed at the Presidio of Monterey in . The Army reorganizations for World War II eliminated the horse cavalry in 1940. The 1st Squadron traded in "saddles and hooves" for "tracks and steel". The Regiment was inactivated July 15, 1942. The personnel and equipment of the former 1st and 2nd Squadrons were combined to form the newly designated 11th Tank Battalion, which fought at the of the Bulge.
On April 1, 1951 the Regiment was reactivated as part of the build-up for the Korean War. The Regiment served at , and , until deploying to to replace the 6th Armored Cavalry Regiment along the Czechoslovakian border.
In July 1964 1/11 ACR, along with the Regiment, transferred to . The Regiment deployed to in September 1966. During five years of combat operations against the Viet Cong and North Vietnamese Army, the Squadron earned two Valorous Unit Awards, three Republic of Vietnam Crosses of Gallantry and the Presidential Unit Citation. One Ironhorse Trooper, 1LT Harold A. Fritz earned the Congressional Medal of Honor while leading his platoon from A Troop during a firefight on January 11, 1969. The 1st Squadron completed its distinguished service in and was deactivated in February 1971.
1/11 ACR did not deploy for Operation Desert Shield/Desert Storm. Following Desert Storm, the Regiment deployed to in support of Operation Positive Force from June to September 1991. The Squadron defended and provided stability that allowed the country to rebuild following the expulsion of Iraqi forces.
Following redeployment to from in September 1991, the Squadron re-assumed border patrol duties. The entire Regiment, including the Ironhorse Squadron, was inactivated at in March 1994.