Task: Question Generation
Input (English): Kentucky, being a border state, was among the chief places where the ``Brother against brother'' scenario was prevalent. Kentucky officially declared its neutrality at the beginning of the war, but after a failed attempt by Confederate General Leonidas Polk to take the state of Kentucky for the Confederacy, the legislature petitioned the Union Army for assistance. After early 1862 Kentucky came largely under Union control.
Output (English): was kentucky part of the union in the civil war?