The Border Security Force (BSF) (सीमा सुरक्षा बल) is a Border Guarding Force of India.
Established on December 1, 1965, it is a paramilitary force charged with guarding India's land border during peace time and preventing transnational crime.
It is a Union Government Agency under the administrative control of Ministry of Home Affairs.
It is one of many law enforcement agency of India. It currently stands as the world's largest border guarding force.
It is the only Indian paramilitary force with its own Marine and Air wings and Artillery regiments that support the general duty battalions in their operations.
BSF has been termed as the First Line of Defence of Indian Territories.
Their motto is जीवन पर्यन्त कर्तव्य (Duty Unto Death).