The regimental headquarters was successively relocated as follows: to Fort Worth, Texas, on 19 July 1925; to Dallas about August 1938.

On arrival, it relieved the Fort Clark Command sector of the Mexican Border Patrol.

The regiment patrolled the Mexican border until being shipped to New Caledonia on 8 July 1942 arriving on 11 August 1942.

[5] After extensive training the 112th made its first amphibious landing at Woodlark Island as part of Operation Chronicle on 30 June 1943.

The landing was unopposed, and the cavalrymen established a defensible perimeter to protect Seabees building an airstrip on the island.

The destroyer USS Shaw sailed close as possible to the enemy defenders to shell them and rescue the survivors of A Troop.

[10] Two of the regiment's second lieutenants, Dale Eldon Christensen and George W. G. Boyce Jr. were awarded the Medal of Honor for their actions during this period.

They were the first U.S. Army unit in the Southwest Pacific to use bazookas and flame throwers against enemy defenses and first used rocket firing DUKWs in amphibious assaults.

Norman Mailer wrote The Naked and the Dead, and Francis Gwaltney authored The Day the Century Ended, later filmed as Between Heaven and Hell.

[16] 1-112 Cavalry officially assumed MFO duties in the Sinai on 8 March 2020, relieving 1st Battalion, 294th Infantry Regiment of the Guam Army National Guard.

[17] On 24 November 2020, 1-112 Cavalry was relieved by 1st Battalion, 133rd Field Artillery Regiment, also of the Texas Army National Guard.

Army Superior Unit Award: 1st Battalion, 112th Armor Regiment (2 SEP 05 - 11 OCT 05).

Army Superior Unit Award: 5th Battalion, 112th Armor Regiment (2 SEP 05 - 11 OCT 05).

Presidential Unit Citation (Army), Streamer embroidered SELESTAT (1st Battalion, 142d Infantry cited; WD GO 56, 1946).

French Croix de Guerre with Palm, World War II, Steamer embroidered VOSGES (142d Infantry cited; DA GO 43, 1950).