When the revolutionary twin jet-powered Arado Ar 234 first appeared in the skies over north-west Europe in the summer of 1944, it represented the state-of-the-art in terms of aeronautical and technica
German U-boats were the scourge of Allied merchant and military shipping in the Atlantic during World War II, threatening to isolate and then starve the UK out of the War. As Germany's war against the
