If KY neutrality is respected

if both sides were to totally respect Kentucky's neutrality for the entire duration of the war what would the effects be? by total respect we shall include no recruiting or invading and the neither side using any river on the boarder of KY for military purpose. So to invade down the Mississippi the Union would cross north of KY and travel by land through MO till they were south of KY then enter the river. I know this last part is crazy but just throw it in.
 
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