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
Presbyterian Church in the United States of America Presbyterian Church in the United States of America The Presbyterian Church in the United States of America (PCUSA) was the first national Presbyterian denomination in the United States, existing from 1789 to 1958. In that year, the PCUSA merged with the United Presbyterian Church of North America, a denomination with roots in the Seceder and Covenanter traditions of Presbyterianism. The new church was named the United Presbyterian Church in the United States of America. It was a predecessor to the contemporary Presbyterian Church (USA). The denomination had its origins in colonial times when members of the Church of Scotland and