The collection represents documents relating to both times George Wilber enlisted in the United States Army, first in 1898 and later in 1899 after having been mustered out of service. Wilber initially enlisted in 1898, possibly as a minor. A letter details that either a parent or legal guardian would have been required to endorse his decision to enlist, should he have been a minor at the time. Wilber enlisted into the 35th Michigan Volunteer Infantry Regiment. The regiment was transferred to Georgia, but never saw combat. The Spanish-American War ended a mere three weeks after it had completed its training.

Wilber was mustered out shorty after but chose to reenlist the following year, which saw him placed in the 42nd Infantry Regiment. That unit was transferred to the Philippines via San Francisco and Honolulu. A newspaper clipping details a letter written to his mother where he described the flowers on Oahu and the queen’s palace. Wilber was later promoted to the rank of First Sergeant.

Included also in the collection are several military manuals from throughout the 1890s. It is probable that Wilber consulted them over the course of his service.