The Hopewell people eventually spread westward to the Illinois River Valley<span> and into Tennessee, where the Mississippian period began some time after 800 C.E. Cahokia was built near where the </span>Missouri<span>, Ohio, and </span>Illinois<span> rivers empty into the </span>Mississippi<span>.</span>
Although there could be several answers, perhaps the most important change brought about by cheap TVs was Americans' perceptions of US involvement in the Korean and Vietnam wars.
