

The regiment would remain in the Southwest until the end of World War I. Later that month, forest fires in Mormon Canyon (Turkey Creek) grew beyond the control of the forest rangers, prompting another call for assistance by the civil leaders a detail of fifty men under Second Lieutenant Arthur S. On 5 July 1917 a provisional squadron, under the command of Lieutenant Colonel White, marched north to Globe, Arizona, for strike duty. Trouble began in the copper mining districts of Arizona as the Union ( IWW) became unmanageable. Jones, Douglas, Arizona, with outposts near Naco, Arizona (30 miles west along the border), west of town near the C & A Copper Smelter, Forrest, Arizona, and Slaughter's Ranch (13 miles east).

The regiment established itself at Camp Harry J. By 17 May, the regiment loaded up on trains and traveled from El Paso to arrive at Douglas, Arizona, on the mid-afternoon of 18 May. On, over five weeks after the American entry into World War I, the regiment received orders for a change of station due to disturbances along the border of Arizona. The first mounted formation of the regiment was held on 4 August 1916 and consisted of all fifteen troops and the wagons of the supply troop. The diagonal line, being the traditional military symbol of cavalry, came from the 14th Cavalry. The demi-horse, in honor of cavalry mounts, was taken from the shield of the 8th Cavalry Regiment. The regiment chose the unicorn from the 6th Cavalry Regiment, which represents the knightly virtues and, in the rampant position, a symbol of fighting aggressiveness, combined with speed and alacrity.

Their uniforms contained green facings in honor of the 3d Cavalry's first engagement at Vera Cruz, and its contribution throughout the campaign of 1847 to the capture of Mexico City. The color green was taken from the 3d Cavalry. Orange is from the 1st Cavalry and was the official color that has historically represented dragoons. In honor of the cavalry regiments that contributed officers, men and experience to the formation of the 17th Cavalry Regiment, the regimental shield shares much from the coats of arm of those units. Colonel Holbrook held command until he was promoted to the rank of major general. Holbrook, assumed command on 9 July 1916, on which date the men from the 8th joined the 17th Cavalry Regiment. The regimental commander, Colonel Willard A. Many of these were recalled from the Mexican Punitive Expedition and since all were experienced troopers, little time was spent in whipping the organization into shape. Thirty-two officers and seven hundred and ninety-one veterans from the 1st, 3rd, 6th, 8th and 14th Cavalry Regiments were transferred as the nucleus of the new regiment. Pershing had taken his columns into Mexico only a short time before and the need of cavalry troops was pressing. The 17th Cavalry Regiment was organized under the provisions of the National Defense Act of 1916 at Fort Bliss, Texas on 30 June 1916 and constituted on 1 July 1916. Today, the 17th Cavalry Regiment is found across the army within the combat aviation brigades, where the squadrons, now constituted as attack/recon helicopter squadrons, carry on the legacy of the 17th Cavalry Regiment. Army Regimental System, an ongoing effort to maintain the lineage and history of the U.S.

Formerly a part of the 1950s Combat Arms Regimental System, it was reorganized as a part of the U.S. The unit was constituted on 1 July 1916 in the Regular Army as the 17th Cavalry at Fort Bliss, Texas and originally inactivated 26 September 1921 at the Presidio of Monterey, California. The 17th Cavalry Regiment is a historical organization within the United States Army that began as a regiment of cavalry after the Pancho Villa Expedition.
