Duchy of Three Hills

The Duchy of Three Hills was a Chisholmian patent of nobility.

It made its holder the ruler of a vast area in the north-east of Chisholm, neighbored by mountains to the east, the Earldom of Highmount in the north, the Duchy of Halbrook Hollow in the west and south, and the Barony of Green Mountain in the south. 

When King Sailys was killed by pirates in the Year of God 880, and his only daughter, Queen Sharleyan, rose to the throne, the Duke of Three Hills found himself unable to accept a female monarch. He rebelled against her, but was overwhelmed by the Chisholmian military and executed on the queen's order.