Original sentence: The name is a reference to the famous Shipka Pass in the Balkans where Russian and Bulgarian troops defeated the Ottoman EmpireOttoman Turks during the Russo-Turkish War of 1877, thereby liberating/counqering Bulgaria
Edited sentence: The name is a reference to the famous Shipka Pass in the Balkans where Russian and Bulgarian troops defeated the Ottoman EmpireOttoman Turks during the Russo-Turkish War of 1877, thereby liberating Bulgaria