FARAH PROVINCE, Afghanistan — In the city of Shewan, approximately 250 insurgents ambushed 30 Marines and paid a heavy price for it. Shewan had been a thorn in the side of Task Force 2d Battalion, 7th Marine Regiment, Special Purpose Marine Air Ground Task Force Afghanistan throughout the Marines’ deployment here in support of Operation Enduring Freedom, because it controls an important supply route into the Bala Baluk district. Opening the route was key to continuing combat operations in the area. “The day started out with a 10-kilometer patrol with elements mounted and dismounted, so by the time we got...