Board Thread:Warhammer 40k General Discussion/@comment-6134883-20130423145616/@comment-6078851-20130618004318

chaos are not masters of teamplay. while they can, and have, joined forces to devastating effect many times, not once  has chaos managed to maintain their alliances. they are chaos and thus inherantly chaotic. the only times chaos have had any semblance of co-operation is under the command of exceptionally willful and powerful leaders like horus, abaddon etc, or when the gods themselves create an alliance. every chaos alliance crumbles whether they win or lose and even the gods' alliances burn out very quickly because they are the embodiement of chaos and as such teamplay isn't particularly high on their 'to do list'.