1819: Many newcomers arrive sick or dying from their long journey across the Atlantic (Đại Tây Dương). The immigrants overwhelmed (tràn ngập) major port cities (thành phố cảng lớn), including New York, Boston, Philadelphia and Charleston. In response, the U.S. passed the Steerage Act (Đạo luật Chỉ đạo) of 1819 requiring better conditions on ships carrying immigrants.