Complex sentence: Historians have argued that this battle is a very important landmark in the history of medieval India since this is the first battle after the first Battle of Tarain (1196) where a Hindu army had won against Muslim invaders.
Split into simpler sentences: Historians have argued that this battle is a very important landmark in the history of medieval India. This is the first battle after the first Battle of Tarain (1196) where a Hindu army had won against Muslim invaders.