For decades the classic, evergreen BBC comedy Dad''s Army has entertained millions of viewers around the world. But the farcical antics of Walmington-on-Sea’s bumbling Home Guard platoon camouflage the true military service of some of the actors themselves. Despite their light-hearted appearance, many of the cast saw active service in one, or even both, of the world wars – and much of it far from humorous.The inspiration behind the sitcom was the experiences of one its writers, Jimmy P