Explain one way Manifest Destiny affected the western part of the United States. (1 sentence)

In India Narendra Modi has imposed complete lockdown on 1.4 billion people as population of India is 1.38 billion.

But in USA Trump has not imposed complete lockdown so the number of cov id 19 cases in USA is increasing.

Manifest Destiny encouraged pioneers to settle farther west and south. The Manifest Destiny doctrine is a phrase and idea that expresses the belief that the United States of America is a nation destined to expand from the Atlantic coasts to the Pacific. This idea was also used by supporters to justify other territorial acquisitions. The supporters of this ideology believed that the expansion was not only good, but also obvious (manifest) and accurate.