FRANCE: Soldiers leading horses along a road in single file, during World War I. The horses are pulling sleighs. According to the photograph's original caption these sleighs were used as stretchers to transport the wounded. The road they are on looks extremely muddy and slippery. MUDDY Hell: Shocking 100-year-old pictures show the quagmires which British troops in the First World War had to fight, live, and march through. Sobering images from the Great War show soldiers battling free a car entrenched in deep mud; a smiling trooper putting on a brave face as he examines his flooded dugout on the Front Line; and an exhausted mule presumably drawing its last breaths as French soldiers desperately try and pull the doomed beast out of a deluged shell hole. Another brutal shot, part of the National Library of Scotland???s online collection, shows a struggling soldier attempting to drag a large gun along a sodden railway track surrounded by bog. Mediadrumimages/PublicDomain