COMBAT OUTPOST PASSERLAY, Afghanistan - Using an oversized sand table as a terrain model, Afghan National Army Col. Mohammad Sarwar points to a spot within the sand where soldiers will construct a patrol base for the Afghan Uniform Police. As the executive officer of the 1st Brigade, 215th Corps, Sarwar is presenting a plan for conducting a clearing operation Feb. 10-12, within Trek Nawa, a sparsely populated area within Helmand Province known for sheltering insurgents.   The 1st Brigade has completed clearing operations within the area before, however, this time the unit will establish three permanent patrol bases for local police units. The bases will be used to provide security to the local communities and prevent the insurgents from gaining a stronger foothold in the province. To accomplish this, Sarwar has gathered military and police officials from throughout the region to coordinate and finalize an assault plan.   The meeting room is full—an assembly of brigade officers and noncommissioned officers, as well as the ANA Kandak commanders that will be leading the mission. The Marjah, Nad’ Ali, and Nawa district police chiefs are also in attendance.   One by one, the leaders present the details of the three-da