describe the main difference between old immigration prior to civil war and New immigration during the gilded age

New immigrants came from war-torn regions of southern and eastern Europe, such as Italy, Greece, Poland, Russia, Croatia, and Czechoslovakia. They were  poorer and less educated than the Irish and German immigrants who had made the journey to the United States earlier in the century.

the two atomic bombs dropped on japan in 1945 killed and maimed hundreds of thousands of people, and their effects are still being felt today. the uranium bomb detonated over hiroshima on 6 august 1945 had an explosive yield equal to 15,000 tonnes of tnt.