Have you considered tracing a World War I ancestor’s experience through newspaper accounts? Such accounts can include details about battles, information about the organization of regiments and numerous personal details. And better yet, for Norwich and Bridgeport, they can be free!
Chronicling America includes digitized versions of the Norwich and Bridgeport papers through the early 1920s, after the end of the War. Hopefully you can find just what you’re looking for about your ancestor!