Why was the demand for agricultural products increasing in the U.S. in the mid-late 19th century?

What was, and still is, the most populous city at the turn of the 20th century?

Despite nearly burning to the ground in 1871, which American city became the second most populous?

What phenomenon is most responsible for the population boom during this time period in the U.S.?

Which job opportunity did many women prefer because it provided them with set hours and free time in the evenings?

What industry did German immigrants such as Frederick Pabst, Joseph Schlitz, and Adolphus Busch help establish in the U.S.?

By the 1980s, more than half of the immigrants to the U.S. came from where?

Immigrants from Southern and Eastern Europe in the late 19th and early 20th centuries were most often which religions?

What major challenge did Southern and Eastern European immigrants face when they came to the United States in the late 1800s?

What immigrant group on the west coast was heavily discriminated against in the mid-late 19th century?

Which congressional act greatly reduced Chinese immigration to the U.S.?

Which Supreme Court case ruled that American-born children of Chinese immigrants were U.S. citizens due to the 14th Amendment?

Which other locations in the Western Hemisphere also saw large-scale immigration at the turn of the 20th century?

Who was the biggest supporter of immigration?

What is the name of the overcrowded, unsafe, and filthy apartment buildings in which immigrants often lived?

Improved transportation led to what outcome according to Crash Course?