Matching Pairs Westward MovementOnline version Link the pairs. Use the information we saw last week: The westward expansion. by Andrea Hurtado 1 Westward Movement 2 Oregon Trail, 3 Indian Removal 4 Indian Removal Act 5 western pioneers Expansion of the United States westward across the Appalachian Mountains and eventually across the Mississippi River. Traders looking for new sources of goods Threatened by the U.S. Army, most American Indian groups signed treaties agreeing to expulsion. law allowed the federal government to force American Indians to move west a route that stretched over 2,000 miles from Missouri to Oregon