In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, opens one of the archival filing cabinets containing historical books and documents inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, files away an artist's rendering of an infantry battle flag inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, looks at a Civil War battle flag from the 148th Infantry Regiment inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, looks at a Civil War battle flag from the 148th Infantry Regiment inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, rolls an American flag that had been hanging in the temperature and humidity-controlled vault inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
In this July 17, 2018, photo, Sgt. 1st Class Josh Mann, the Ohio Army National Guard historian, pulls a video reel from one of the large rolling cabinets storing the historical artifact collection inside the Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
This July 17, 2018, photo, shows the Ohio National Guard Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)
This July 17, 2018, photo, shows the Ohio National Guard Beightler Armory in Columbus, Ohio. The Ohio National Guard is celebrating its 230 years of service. (Adam Cairns/The Columbus Dispatch via AP)