A friend of mine a long time ago had a story about a relative who was taken prisoner in Italy during WW2. According to my friend, this man was never heard from, until some time after the war when he suddenly turned up at his old home. His family were still living there, and you can imagine their shock on seeing him. However, far from being welcomed back to these shores as a hero, he was arrested by the Army and interrogated for being a possible deserter. Nothing came of that, but he was made to serve a period of time back in the Army, and it was only later that my friend's family found out that he had 'gone to ground' somewhere in Italy after the Armistice, where he had left two children behind! It all sounds all a bit unlikely, but I guess there was a degree of turmoil after the War, and perhaps this chap's tale wasn't all that unique. It would make a good film...and probably already has!
G