The "Westward Movement" refers to the period in the 19th century when American settlers expanded westward across the continent. This migration was driven by the belief in Manifest Destiny, the idea that Americans were destined to expand their territory from the Atlantic to the Pacific Ocean. Settlers sought new opportunities, including land for farming and resources. The movement led to the establishment of new states and territories, as well as conflicts with Native American tribes and other nations. Key events during this time included the Oregon Trail and the California Gold Rush, which attracted thousands of people seeking wealth and a better life.