I believe kakashi said it was his eye ability somewhere.
Like he said how that ability even surpasses the 4th's hirashin or something.
I think I'm wrong lol
I guess i was wrong lol :P
I should go reread the manga ahaha.
But Madara didn't have the EMS for a long time.
Madara says the senju's called for a truce after he obtained it.
I might be making assumptions but that's the way it sounded from the way he said it.