Regiment - United States Army

United States Army

The United States Army was also once organized into regiments, but in the 20th century the division became the tactical and administrative unit. Industrial management techniques were used to draft, assemble, equip, train and then employ huge masses of conscripted civilians in very short order, starting with minimal resources.

Historically, a regiment consisted of three battalions and the regiment headquarters (HQ) company. Training, administration and even tactical employment was centered at divisional level. Many, but not all combat support and logistics was also concentrated at that level.

A new system, the Combat Arms Regimental System, or CARS, was adopted in 1957 to replace the old regimental system. CARS uses the Army's traditional regiments as parent organizations for historical purposes, but the primary building blocks are divisions, brigades, and battalions. Each battalion carries an association with a parent regiment, even though the regimental organization no longer exists. In some brigades several numbered battalions carrying the same regimental association may still serve together, and tend to consider themselves part of the traditional regiment when in fact they are independent battalions serving a brigade, rather than a regimental, headquarters.

The CARS was replaced by the United States Army Regimental System (USARS) in 1981.

There are exceptions to USARS regimental titles, including the Armored Cavalry Regiments and the 75th Ranger Regiment created in 1986. On 1 October 2005, the word "regiment" was formally appended to the name of all active and inactive CARS and USARS regiments. So, for example, the 1st Cavalry officially became titled the 1st Cavalry Regiment.