How did eastern european ethnic and religious groups contribute to american culture in the 1800s?

In 1609 the Dutch East India Company sent Henry Hudson to investigate the region where New York City is now. There shaped a settlement named New Holland and its capital was New Amsterdam. The Puritan religion accompanied the Quakers and Amish, who settled along the Delaware Waterway; additionally the Baptists and Mennonites originated from Eastern Europe. The new Pennsylvania town developed quickly with the German peasants of the Rin River and with the Irish-Scots who later arrived. Subsequently, religion had the impact of the Puritans, who carried with them the  work values, simple life, a long way from the transgression of old Europe, and with their traditions, old stories, legends and even music, as polyphonic religious music.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.