 On 13 February, L/Sgt Dave Greenhalgh, aged 25, from Grenadier Guards, 1st Battalion, died in an explosion while on patrol in the Nad Ali area in Helmand province.On 14 February, Kingsman Sean Dawson, aged 19, from The Duke of Lancaster's Regiment, 2nd Battalion, died after being shot by Afghan forces in an friendly fire incident in Musa Qala in Helmand province.On 14 February, Rifleman Mark Marshall, aged 29, from 6th Battalion The Rifles, 3 Rifles Battle Group, died in an explosion while on patrol in the north-east of Sangin in Helmand province.