A new episode of Research Rabbit Hole, our Facebook Live show, premiered Monday evening, April 19, at 9 p.m. ET.

Season 1, Episode 8, is focused on a soldier who served in the storied 2nd Wisconsin Infantry, an Iron Brigade regiment that made its name at Gettysburg and other major Civil War battles. The 2nd paid a high price in casualties, including Sgt. Theodore Dosch Bahn of Company H. A look inside his pension file provides details about his military service—and reveals the value of these unique documents as a research tool.

The full season is available on YouTube.

New episodes of Research Rabbit Hole will be released every two weeks on our Facebook page. The host, Ronald S. Coddington, is Editor and Publisher of Military Images.