This allows for an assault to effect all entities in range. If 3 cockroaches are on the same wound tile, can they all be caught with one assault? Thanks.
In your particular case, it's impossible to discard all Cockroaches, as there is only 1 Wound there. But if the situation was different, and there would be three spaces with a Cockroach and Wound in each, a player with the Tactics card would be able to discard all 3 Cockroaches in one Assault Action.