I guessed that there was one colour each for the player and enemy figures, but then I've had either drop on the red markers when I'd placed blue ones as well. It seems like they're being used 1,2,3 etc. ... I'm assuming they'll be used randomly if you place multiple of the same number? Basically, what is up with these?
I'm pretty sure it's 1 colour per player - based on who's player 1 and two (blue and red, can't recall which is which).
Red is for player 1 and blue for player 2. then imagine player 1 was 2 groups. group 1 with 3 people and group 2 with 2 people, you must place 3 red ones and 2 red 2