Why did Chinese immigrants frist come to America? what changed?

Chinese immigrants first flocked to the United States in the 1850s, eager to escape the economic chaos in China and to try their luck at the California gold rush. When the Gold Rush ended, Chinese Americans were considered cheap labor. In the 1860s, it was the Chinese Americans who built the Transcontinental Railroad.

Explanation:

I hope that helped.

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.