On 6 July 1916, subordinate units of the regiment were mustered into Federal service for the Mexican border and stationed at El Paso, Texas.

It served in both France and Belgium and was mustered out on 12 April 1919, elements returning to state service as the 8th Pennsylvania with the regimental headquarters at Harrisburg.

[3] After transfer to Salem, Oregon, the units of the regiment were retitled in this manner: The 104th Cavalry Group was not sent overseas.

TF Saber deployed to Bosnia Herzegovina as a part of SFOR 12 for a NATO peacekeeping mission earning the Governor's Unit Citation (Permanent Orders 97-2 dated 25 October 2006).

The 2d Squadron is assigned to the 56th Stryker Brigade Combat Team, 28th Infantry Division, Pennsylvania Army National Guard.

From 2020-2022 1st and 2nd squadron took part in Security operations in Philadelphia and The District of Columbia in response to BLM riots and January 6th.

[5] A circular device, 1+1⁄4 inches (3.18 cm) in diameter, with the Regimental motto "Over, Under or Through," lettered around the outer circumference.

Outer circumference and horse's head in yellow; motto and crossbar in blue; keystone in red; and Maltese cross in black.

The shield is of yellow – the Cavalry color; the blue bend is for service as Infantry; the black Maltese cross is for the service in Puerto Rico; the red keystone is the Divisional insignia of the Twenty Eighth Division in which elements of the First Cavalry and the Eighth Infantry served.

The distinctive unit insignia was originally approved for the 104th Cavalry, Pennsylvania National Guard on 24 January 1924.

Or on a bend Azure five mullets of the first between in sinister chief a Maltese cross Sable and in dexter base a keystone Gules.

That for the regiments and separate battalions of the Pennsylvania Army National Guard: On a torse of the colors Or and Azure a lion rampant guardant Proper, holding in dexter paw a naked scimitar Argent hilted Or and in sinister an escutcheon on a fess Sable three plates.

The shield is of yellow – the Cavalry color; the blue bend is for service as Infantry; the black Maltese cross is for the service in Puerto Rico; the red keystone is the Divisional insignia of the Twenty Eighth Division in which elements of the First Cavalry and the Eighth Infantry served, and the five stars represent the five major operations of the Twenty Eight Division.

The coat of arms was originally approved for the 104th Cavalry Regiment, Pennsylvania National Guard on 3 January 1924.