'Despite the fact that many Irish were sympathetic to Germany throughout the war, they were clearly earmarked by the Nazis for invasion and for the same fate as all the other countries in Europe.Mr Westwood Brookes said it was also possible that Hitler might considered invading Ireland first to establish an invasion force there for a later attack on the UK mainland.He added: 'It would have made complete military sense for the Germans to invade Ireland as it was a perfect location to set up to reinvade England in a bid to take Britain back from the Germans.