Railroad companies promising a ticket to land lured Irish, Chinese and other immigrants to America.
When they could not get to the train on time they stayed in the city and worked to feed their families.
Some worked for the railroads and others in factories, but almost all worked for very low wages to keep their jobs.
Immigrants were the cheapest workers so many American citizens were kicked out of their jobs for the cheaper labor.
Central Pacific hired many Irish immigrants while Union Pacific hired many Chinese.