>>sabotage them in ambushes Well that's what the resistance did Now for the exposure part, well, nazis didn't need help, they were quite obvious. And on top of that they managed to get ever larger swath of the local populations to hate them with terror tactics such as shooting up entire villages for the actions of a few. In hindsight false flags would have been more appropriate to get the opposite result... In the beginning not everybody was against nazi occupation, mostly because french society was also on the path of decadence https://pic8.co/sh/gWYlBm.jpg On the left: laziness, demagoguery, internationalism On the right, labor, family, homeland https://en.wikipedia.org/wiki/R%C3%A9volution_nationale Taking a position/territory is one thing, occupying for a prolonged period of time is quite another exercise, it requires much more than mere military skills/tactics/strategies If you take the US army and the invasion of iraq, episode 2, all went well during the invasion phase and not everybody was unhappy with the removal of saddam... It's during the occupation phase that shit really went sideways overtime, that's when it backfired bigly