[1] The current 1st Squadron carries the lineage of the original Company A from the unit's constitution in 1833 through the implementation of the Combat Arms Regimental System in 1957.

After World War II, the Regiment reorganized as the 1st Tank Battalion, was later converted to the 1st Constabulary Squadron, serving on occupation duty in Germany until December 1948, when it was inactivated.

During October, 1962, as a result of the Cuban Missile Crisis, the Squadron moved to Fort Stewart, Georgia with other elements of the 1st Armored Division.

As the world situation eased, the Squadron participated in a STRAC (Strategic Army Corps) mobility exercise and amphibious training at Port Everglades, Florida.

During the spring of 1963 the Squadron took part in the STRICOM (Simulation, Training & Instrumentation Command) exercise "Swift Strike," and then returned to Fort Hood.

In the Pineapple Forest Battle of February 1968, the ground-air cavalry team had its greatest victory, killing 180 of the enemy without losing one of its own number.