What did Spain do after the American Revolution to discourage American settlements west of the Appalachian Mountains? A. Spain a
ttacked American ships at sea. B. Spain forbade American trade in New Orleans. C. Spain placed a heavy tariff on American-made goods. D. Spain went to war with the United States.
Answer:In the end, Texas was admitted to the United States a slave state. The annexation of Texas contributed to the coming of the Mexican-American War (1846-1848). The conflict started, in part, over a disagreement about which river was Mexico's true northern border: the Nueces or the Rio Grande.