Which Two Countries Became The Largest Source Of Immigrants From 1820 1860 Where Did The Two Groups Settle Predominantly?

Which Two Countries Became The Largest Source Of Immigrants From 1820 1860 Where Did The Two Groups Settle Predominantly? Between 1820 and 1860 most immigrants came from northern and western Europe. The potato famine in Ireland (1845-1847) brought large numbers to the United States. The unsuccessful 1848 Revolution in Germany also created considerable emigration. Others