Which best describes the impact of the War of 1812 on western settlement in the US?

The War of 1812 had a significant impact on western settlement in the United States by weakening Native American resistance, as many tribes had allied with the British. With the decline of Native American power, settlers felt more secure and began to move westward in greater numbers. Additionally, the war fostered a sense of nationalism and economic independence, further encouraging expansion into the western territories. Ultimately, the conflict accelerated the westward push and laid the groundwork for future U.S. territorial expansion.