A sniper is a highly trained marksman who operates alone or in pair who maintain close visual contact with the enemy and engages targets from concealed positions or physical distances exceeding the detection capabilities of the enemy personnel, without being detected. These sniper teams operate independently, with little combat asset support from their parent units. Snipers typically have highly selective and specialized training and use high-precision rifles and optics, and often have sophisticated communication assets to feed valuable combat information back to their units.
In addition to marksmanship, military snipers are trained in camouflage, field craft, infiltration, reconnaissance and observation. Snipers are especially effective when deployed within the terrain of urban warfare, or jungle warfare.
Read more about Sniper: Etymology, Modern Warfare, History, Police, Training, Targeting, Hide Sites and Hiding Techniques, Counter-sniper Tactics, Irregular and Asymmetric Warfare, Notable Military Snipers