http://www.dailyrecord.co.uk/news/editors-choice/2010/05/16/dunkirk-survivor-on-horror-of-troops-stranded-after-evacuation-86908-22262638/...
Thousands of PoWs were frogmarched through France and Germany to camps in Poland. It took two months in often sweltering heat, with little food or water. David said: "Hundreds died on that march. It was terrible. We were eating buttercups and bloody daisies, nettles, anything.
In Poland, David was held in an old fort, walls green with damp. Weak and starving, he contracted gastroenteritis, twice. He said: "Apparently I was screaming my head offfor a week." He was sent to a farm near Danzig (now Gdansk) where he worked for over two years, regaining his strength despite almost being bayoneted by a guard for refusing to eat with the animals.
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But as Russian troops advanced, the PoWs were rounded up and forcemarched again, this time in deep snow and going nine days without food. After a night sleeping in the open, David and two others hid in a ditch as the snow covered them. He escaped because he realised he'd die if he didn't. The escapees stayed in abandoned farms en-route to the front line.
One night they heard tanks coming. David said: "By the time we were up and dressed it was too late. We thought they were Russians - but it was the SS."
David and the others were lined up before a firing squad: "I said 'Say a prayer, lads,' and then this Wehrmacht officer came on the scene, an ordinary soldier, and he stopped it. He handed us on to another lot and we were taken back more or less to where we'd started from." They were finally liberated, not by the Russians but by the Seaforth Highlanders.