The answer is: Cities
Approximately, around 80% of united states population live in the cities. This happen because most of job opportunities that exist in united states (whether it's art, technology, or manufacturing) are located in the cities.
Because of this, even people who born in rural areas start to move to inner cities in order to find jobs and sustain their living.
Explanation:
The 13th Amendment banned slavery and all involuntary servitude, except in the case of punishment for a crime. ... The 15th Amendment prohibited governments from denying U.S. citizens the right to vote based on race, color, or past servitude.
Answer:
Mostly they were eager to put themselves in danger. Only a small % would ever surrender
So I would say in general they were not motivated by fear of Allied Forces just of fellow opinion.
Explanation:
There were way more jobs in the city and the similar immigrants could cluster together and support eachother