Mastoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.astoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.
The Germans had little choice â few other places besides the United States allowed German immigration. Unlike the Irish, many Germans had enough money to journey to the Midwest in search of farmland and work. The largest settlements of Germans were in New York City, Baltimore, Cincinnati, St. Louis and Milwaukee.n the decade from 1845 to 1855, more than a million Germans fled to the United States to escape economic hardship. They also sought to escape the political unrest caused by riots, rebellion and eventually a revolution in 1848.
From 1880 to 1924, more than two million Eastern Europeans, mainly Catholics, immigrated to the U.S. Of those, immigrants of Polish ancestry were the largest group. During the same period, roughly two million Jews came to the U.S., seeking opportunity and fleeing the political massacre taking place in Eastern Europe. Italian immigration to the U.S. reached its peak of over two million between 1910 and 1920. Immigration quotas passed in the 1920s tended to favor earlier generations of immigrants by giving preference to Northern Europeans.