The Fusion Fighters United Army (クロスハート連合軍 Kurosu Hāto Rengougun?, lit. "Xros Heart United Army") is the allied army of the Fusion Fighters and Blue Flare. In the anime, it was born after Mikey Kudo, the Fusion Fighters' General, returned from the Human World. During the campaign against [[NeoMyotismon ()|NeoMyotismon]], he finally joined forces with Christopher Aonuma's Blue Flare army. In the manga, the united army was created after the Fusion Fighters and Blue Flare worked together to defeat [[Blastmon ()|Blastmon]] at Odaiba in the Human World.