During the last 10-15 years of the Progressive Era, more than 15 million immigrants arrived in the United States— a number equal to the total number of immigrants that arrived in the previous 40 years. In 1910, three-fourths of New York City's population was made up of either immigrants or first generation Americans. Unlike earlier immigrants, the majority of the newcomers during this time came from non-English speaking European countries. Immigrants mostly traveled in from southern and eastern European countries, including Poland, Italy and Russia. Due to the difference in both language and culture, these immigrants had great difficulty adjusting to the American lifestyle.
The immigrants were not the only