2013-04-15 : Once a battalion ability has triggered, it doesn't matter how many creatures are still attacking when that ability resolves.

2013-04-15 : The effects of battalion abilities vary from card to card. Read each card carefully.

2013-04-15 : The three attacking creatures don't have to be attacking the same player or planeswalker.

2013-07-01 : Creatures that come under your control after Frontline Medic's battalion ability resolves will not be granted indestructible by this effect.