How was the wave of U. S. immigration in the late 1800s different from the previous wave of immigration in the mid-1800s?

The United States did experience major waves of immigration during the colonial era. The first part of the 19th century and from the 1880 to 1920. Many immigrants came to America seeking greater economic opportunity. while some, such as the Pilgrims in the early 1600 arrived in search of religious freedom

Explanation:

racism and segregation.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.