British troops to occupy western part of Afghanistan 's Helmand province . U.S. Marines to take over in Sangin , British defense secretary says . British forces will move to central district of Helmand . UK : The political fallout of the move , however , is unpredictable , Clarke said . Analyst says move is not a defeat and that it makes sense .
British troops to occupy western part of Afghanistan 's Helmand province . U.S. Marines to take over in Sangin , British defense secretary says . British forces will move to central district of Helmand . UK : Analyst says move is not a defeat and that it makes sense .