Digimon Xros Wars: Aku no Death General to Nanatsu no Oukoku
English name: Digimon Fusion
Genres: Action, Adventure, Comedy, Fantasy
Type: TV, Episodes: 24
Aired: Apr 3, 2011 to Sep 25, 2011
Studio: Toei Animation
Source: Original
Rating: PG - Children
Synopsis:
Returning to the Digital World, Taiki and Shoutmon learn that the Bagra Army has taken it over and reformatted the world to have Seven Kingdoms, each ruled by a general. 

(Source: AniDB)