Re: what army?
madara has 7 beasts, which control different elemtns or have vast amounts of chakra.
sand, steam, lava is what we know. Then we have a giant turtle which is ubeatable on water. Then we have a slug which may have one of the mizukages kekke genkai like the water radical yoton. Then we have the seven tails, loads of chakra and power.
Then we have zetsu, which can go to any location at awsome speeds can split in two and makes spores which then absorb your chakra and can be used to recover his teammates chakra.
Then we have kisame, a guy with sword that can abosrb chakra and shave skin off. And, let's don't forget his mastery of suiton. And he mut have somthing under his sleeves.
Then we have taka...karin the useless which u can bite to fully recover(and how knows what would happen if you bite her in the stomach which is believed to be the heart of chakra system?). Then suigetsu the swordless,who can turn into water and never seem to be able to actually die. IMO he may fight chojuro in a next future). The juugo the master fo curse-mark which can implant his tissue into to to heal and mend any damages plu he can transform any part of his body at will. And then he can suck the opponents juices/tissues or whatever he sucked from the samurai.
And finally we have the last memebers of uchiha clan. madara the deathless and who can teleport to anywhere at will nad has the yet to be known abilites of his eternal mangekyou sharingan. and then over-powered sasuke with susanoo(with totsuka and yata mirror) amaterasu, ENTON, KATON, RAITON, kirin and tsukuyomi. Plus, IMO we're still missing his OWN mangekyou abilities.