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