What role did the westward expansion of the united states play in the increased sectional tensions of the major regions of the united states?

They had gained more land and now they had successfully completed Manifest Destiny

Explanation:

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.