There was a war in germany that is why they came to America
The California gold rush began on January 24, 1848. The Gold Rush ended in the year 1855.
Japanese imperialism was not simply about increasing the nation’s territory. It was also fueled by a strong ideological sense of mission and racial superiority. In the minds of many Japanese, expanding their empire into other Asian regions was somehow different from that sort of imperialism. They thought of their ambitions as bringing their Asian brethren together. Hope this helps in some way!