What is the fine-grained topic of the following text: So after the tennô had been raised to a sufficiently sonkei-able position, the slogan was quietly dropped and replaced with another: 富国強兵 fukoku kyôhei, or "rich country, strong military", the rallying call of Japan's wildly successful Meiji Era and the seed of its megalomania during World War II. Only return the topic.
Japan's Meiji Era and World War II slogan "rich country, strong military"