https://www.theregister.co.uk/2017/08/21/jack_nissenthall_75_anniversary_pourville_raid/

Would you give up your comfy technical desk job to join a military raid into hostile territory? Would you jump at the chance to put your world-leading technical knowledge to use in the most extreme of circumstances, even if your own side was under orders to shoot you if you got captured?

This was the choice that Jack Nissenthall, a radar expert and RAF flight sergeant, faced 75 years ago. At the time, the Second World War in the West was at a relative stalemate. Nazi Germany had conquered most of the continent and, unable to overcome the RAF’s tenacious resistance and invade the British Isles, had turned its appetite for war and conquest east towards communist Russia.