@Rizkid1412 Well, seeing how Japan in this timeline is being filled with advance technology, chances are, the black ship of Perry's expedition wouldn't be as much of a threat to Japan in the future as they have more advanced technologies that the Americans, and that's assuming Japan will isolate themselves in the future of this timeline, which the different ideology, chances are, they would actively do trade with western countries (Nanban), which would prevent the expedition from happening in the first place, preventing the Meiji restoration from happening, and thus stopping the rise of militarism, and so in the end, Japan might not even participate in WW2. But hey, this is just a theory, a game theory.