After the war had began, and following Bormann’s stringent efforts to beef up security around the Berghof and prevent day trippers and hikers from getting anywhere near the place, any real threat of assassination had to come from insiders. Hitler was to face some serious attempts by members of his own armed forces to kill him whilst he was at home on his mountain. The resolve of his opponents to carry out their plans was severely tested by Hitler’s formidable security apparatus. Killing Hitler soon became virtually a suicide mission for the few people who were prepared to act.