![](http://www.alamy.com/thumbs/6/CD82A0FC-F892-4471-A82D-0B7AB7B939C0/2PC9169.jpg)
Intrenchment at (?) Relay House, B & O , Mass. Regiment(?). Civil War Photograph Collection . Soldiers, Union, 1860-1870, Railroad bridges, 1860-1870, United States, History, Civil War, 1861-1865, Military personnel, Union, Maryland, Elk Ridge , United States, History, Civil War, 1861-1865, Transportation, Maryland, Elk Ridge
Size: 4938px × 2537px
Photo credit: © piemags/CMB / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bridges--1860-1870., railroad, soldiers--union--1860-1870.