America's westward expansion following the Civil War often resulted in conflict between?

America's westward expansion following the Civil War often resulted in conflict between settlers and Indigenous peoples, as the encroachment on Native lands led to violent confrontations and forced relocations. Additionally, tensions arose between different groups of settlers, such as ranchers and farmers, competing for resources and land. This period also saw conflicts with foreign powers, particularly in areas like the Southwest, where territorial disputes emerged. Ultimately, the westward movement reshaped the social and political landscape of the United States, often at the expense of marginalized communities.