"Lance Corporal Underground" is a military slang term used to describe the informal network of information and communication that exists among lower-ranking soldiers in a unit. This network operates outside of the formal chain of command and is used to share news, rumors, and practical information. The term "Lance Corporal Underground" refers to the idea that this network is underground, operating beneath the radar of higher-ranking officers and NCOs. The information exchanged through this network is often informal and not sanctioned by official channels, but it can be an important source of support and information for lower-ranking soldiers. The "Lance Corporal Underground" is a reflection of the close bonds that form among soldiers in a unit and the way in which these bonds can be used to support one another and improve morale and mission effectiveness.