Americans held the balance of power between Appalachian Mountains and the Mississippi River after the American Revolution.
US and Great Britain signed the Treaty of Paris in 1783 to end the American Revolutionary War. The treaty set the boundaries between US and Great Britain territories, including Great Britain's concession of the trans-Appalachian west region to the US.
It was primarily "<span>d. the vulnerability to invaders from the north", since the Mongol territory was rapidly expanding--making the Mongol warriors all the more powerful. </span>
NO we faught back!! Thats how we entered WW2.
This was the quartering act