The California Gold Rush was the largest mass migration in U.S. history. There were more than 300,000 new arrivals in just a few years.
SolaTrim, shenhuifu.org

The California Gold Rush was the largest mass migration in U.S. history. There were more than 300,000 new arrivals in just a few years.

Preview photo credit: SolaTrim
Source: history.com/news…