Their role will mark the beginning of the endgame of operations in Afghanistan - but will be no less hazardous. Soldiers from the 1st Mechanized Brigade, drawn from bases across Wiltshire, Oxfordshire and Berkshire, are about to embark on a sixth month deployment to Helmand.
Martin Dowse watched them make their final preparations on Salisbury Plain.
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Cloud and rain first thing but it will gradually dry up from the north west. Becoming bright in the west, staying quite cloudy in the east
Rain becoming more persistent overnight. Rain and cloud slow to clear tomorrow but becoming dry by the afternoon. Some brightness later
Rain becoming more persistent overnight. The rain gradually clearing tomorrow morning then sunny spells for the afternoon, feeling cooler