Operating from a remote patrol base in Helmand, two British snipers were responsible for killing 75 Taliban fighters in just 40 days. In one remarkable feat of marksmanship, two insurgents were dispatched with a single bullet. The arrival at the newly-established Patrol Base Shamal Storrai (Pashto for “North Star”) in late August 2009 of Serjeant Tom Potter and Rifleman Mark Osmond marked the start of an astonishing episode in the history of British Army sniping. Within 40 days, the two marksmen from 4 Rifles, part of the Welsh Guards Battle group, had achieved 75 confirmed kills with 31 attributed to...