5. Attack on Emigrant Train by Charles Wimar (1856) Although Indian attacks on Western emigrants were rare, this image was so powerful that it influenced portrayals of Indians in Western movies made by Hollywood more than a century later.

8. The Spanish mission system Mexico seeks to strengthen northern regions In Texas, Mexican government gives land grants to American settlers

10. Those who opposed Texas annexation (largely because they opposed slavery) Those who favored annexation (southerners and those who favored slavery)