Original: Louis ' sons ( 876-887 ) Within East Francia four stem duchies had ( re - ) developed : Swabia ( Alamannia ) , Franconia ( the eastern part of former Austrasia ) , Saxony and Bavaria .
Simplified: East Francia was divided into four duchies : Swabia ( Alamannia ) , Franconia , Saxony and Bavaria ( with Carinthia ) .