How did westward expansion change the lives of Americans after reconstruction. *

In the mid-19th century, the quest for control of the West led to the annexation of Texas and the Mexican–American War. ... This expansion led to debates about the fate of slavery in the West, increasing tensions between the North and South that ultimately led to the collapse of American democracy and a brutal civil war.

answer; ///i believe that the correct answer is (a) the great depression

a drastic rise in oil prices ended decades of postwar.