The North-Western Contingent order of battle (NWPORBAT; officially order of battle is known as "Tri-services framework (TSW)"), is the comprehensive deposition and systematic structure of the unified Pakistan military forces in tackling down and controlling the insurgency in Western Pakistan. The deployments began in 2002 after the U.S. invasion of Afghanistan in 2001 in a response to the deadly terrorist attacks in New York, United States.