[1] The regiment was constituted on 10 November 1942 and activated at Camp Lockett, California on 25 February 1943, assigned to the 4th Cavalry Brigade of the 2nd Division.

[3] The regiment was commanded by Colonel Edwin M. Burnett and conducted training in southern California while patrolling the Mexico–United States border.

[5] In December, the Department of War decided to send the division to North Africa, where it would be broken up into service units, which were needed more than cavalry.

It was moved by train to Camp Patrick Henry, Virginia, between 10 and 15 February, being brought up to strength by 243 replacements from Fort Huachuca.

A little over two weeks after arrival in Algeria, on 31 March, the 2nd Cavalry Division and its component regiments were inactivated at Hassi Ben Okba near Oran.