In the late 1800s, people in many parts of the world decided to leave their homes and immigrate to the United States. Fleeing crop failure, land and job shortages, rising taxes, and famine, many came to the U. S. because it was perceived as the land of economic opportunity.
The Ottoman Empire. When one European power annexed a part of its crumbling power, it caused concern that they might get it all. The other European powers wanted a chance at picking it apart too.