Japan and Germany could do what they did because they were under the US protection of those brinkmanship tools.
Furthermore, military tech has a huge impact on everyday life (jet engines, satellites, communications). Even when the tech was not directly invented by the military, it was still at some time a major customer or patron of the tech.
Furthermore, military tech has a huge impact on everyday life (jet engines, satellites, communications). Even when the tech was not directly invented by the military, it was still at some time a major customer or patron of the tech.