Title '13 Inch Mortar' refers to a specific type of artillery piece used during the U.S. Civil War. This particular piece, identified as (2), was deployed near Petersburg, Virginia, during military campaigns. The 13-inch mortar is a large-caliber weapon primarily used for bombarding fortified positions at long ranges, contributing significantly to the tactical landscape of the Civil War's siege warfare. The number following the name suggests that this may be one of multiple identical weapons in service at the time. However, further research is needed to delve into the specific historical context and details regarding this particular 13-inch mortar (2) in front of Petersburg, Virginia.