DEATHWATCH chapter tactic

•Each time a model with this tactic makes a melee
attack against a TYRANIDS, AELDARI, ORK,
NECRONS or T’AU EMPIRE unit,
RR a hit roll of 1.
•After both sides have finished deploying their armies,
select one Battlefield Role. Until the end of the battle,
each time a model with this tactic makes an attack against an enemy unitwith that Battlefield Role,
re-roll a wound roll of 1.