Archives are a fantastic source of information for research into military history, especially those that contain first-person narratives or other primary sources. UW Libraries has many digital databases that are linked to archives. More importantly, the American Heritage Center (AHC) at UW holds many primary sources of military history from Wyoming veterans.
The following are primary source collections recommended by Duke University and their Professor Byers:
Source: Military History Research Guide: https://guides.library.duke.edu/c.php?g=289844&p=1931530; accessed 7/20/2021.