History of immigration to the United States 1850. In 1848, the Treaty of Guadalupe Hidalgo, concluding the Mexican War, extended U.S. citizenship to approximately 60,000 Mexican residents of the New Mexico Territory and 10,000 living in California. An additional approximate 2,500 foreign born California residents also become U.S. citizens. In 1849, the California Gold Rush attracted 100,000 would-be miners from the Eastern U.S., Latin America, China, Australia, and Europe. California became a state in 1850 with a population of about 90,000. Between 1850 and 1930, about 5 million Germans migrated to the United States, peaking between 1881 and 1885 when a million Germans settled primarily in the
History of Christianity in the United States most Christians in the United States are Mainline Protestant, Evangelical, or Roman Catholic. Because the Spanish were the first Europeans to establish settlements on the mainland of North America, such as St. Augustine, Florida in 1565, the earliest Christians in the territory which would eventually become the United States were Roman Catholics. However, the territory that would become the Thirteen Colonies in 1776 was largely populated by Protestants due to Protestant settlers seeking religious freedom from the Church of England (est. 1534). These settlers were primarily Puritans from East Anglia, especially just before the English Civil War (1641–1651); there were