Battalion — Whenever Legion Loyalist and at least two other creatures attack, creatures you control gain first strike and trample until end of turn and can't be blocked by creature tokens this turn.
4/15/2013 The three attacking creatures don’t have to be attacking the same player or planeswalker.
4/15/2013 Once a battalion ability has triggered, it doesn’t matter how many creatures are still attacking when that ability resolves.
4/15/2013 The effects of battalion abilities vary from card to card. Read each card carefully.