Which of the following had the greatest impact on the outcome of the Civil War? Economic differences between the Union and the Confederacy

The amount of military training given to Union forces and Confederate forces

Religious differences between the Union and Confederacy

The alignment of foreign allies with the Union or with the Confederacy

answer: the apache, comanche, kiowa, crow, and osage tribes are plains indians.  

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation: