How did the western expansion impact the relationship between the American government and Native Americans

It contributed to the hostility of American government and Native Americans.

Explanation:

Because of the western Expansion, the influx of immigrants that come to Western front far surpassed that the American government initially predicted. The government did not have enough land to accommodate these immigrants.

To handle this, American government decided to take the ancestral lands that previously belonged to the native American and force them to live in reservation. This caused series of wars/conflicts between Native Americans and the American government.