Why did world war 1 deeply affect american modernist writers

To keep other european powers from threatening its empire in america, spain sent soldiers, settlers, and?

Describe the geography of the nile valley . how did this geography affect civilizations that emerged in the nile valley

How and why did the policies of the federal and state governments toward native american people change between 1790 and the 1850s. what were the reaction of native american people to these policies?