The economy is the best answer because its the biggest factor worldwide.
An Invisible Warfare is basically when the victims of an attack are unaware and without warning nor immediate knowledge are being attacked.
Nazi Germany was chaotic. Wide spread racism was apparent in the air towards Jews, Gypsies, Bisexuals, and many more minorities. Hitler brainwashed all his followers into believing in an autocratic government which ensured it's followers in permanent prosperous in the near future. Nazi Germany was well known around the world, making it have many enemies (and some allies) at that time. Nazi Germany will be forever known. Hope this helped :)
