Major Grubert served as 110th MG Bn Supply Officer and later Legal Officer during WWI. The unit returned after occupation duty in German, through Ireland, Scotland, and disembarked in New Jersey to demobilize at Ft. Lee, VA in 1919.

Mexican Border Service.

Entered active duty under the command of Gen. John J. Pershing serving on the Mexican Border. Returned to Staunton, VA in 1917. The Regiments were soon alerted and drafted into active service later the same year to serve in World War I.

World War I.

In 1917, the regimental elements of the VA 1st, 2nd, and 4th Regiments of Infantry formed the 116th Infantry Regiment. Upon arrival at Camp McClellan, AL, the 116th became one of three Infantry Regiments in the 29th Infantry Division.

The Div. deployed to France as part of the American Expeditionary Force (AEF). Major, then Capt. Grubert served as 110th MG Battalion Supply Officer and later Summary Court Officer during WWI. The unit returned by ship after occupation duty in German, through Ireland, Scotland, and disembarked in New Jersey to demobilize at Ft. Lee, VA in 1919.

e returned with the Regiment and continued to serve through the 1930s. A 1921 Annual Training Encampment roster list him as the Commander of , Company A, 1st Virginia Infantry Regiment (Provisional) for the Encampment at Camp Meade, MD, Virginia National Guard, 22 July 1921, at Camp Meade, MD. Major Gurbert retired from active Virginia Army National Guard service prior to World War II.

World War II

 Major Grubert (Retired) registered for the Draft in 1941 at the age of 57. During World War II, he spent time in Hawaii. This is revealed in photographs from Hawaii in the album. The reason for this extended travel and his involvement in WWII for this travel is turns out to be his second profession as a Civil Engineer, employed by the War Department.