What are the causes of many empires falling?

Which european country was directly in the middle of many of the routes used in the crusades and benefitted most from increased trade? england spain germany italy

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.

When congress passed the way davis bill in response to lincolns reconstruction plans the president did what to the bill