Brotherhood Of Veterans

Battle-brothers of the Deathwatch learn not only the
many ways in which to slay xenos, but also gain an understanding of the tactics and stratagems of fellow Chapters.
Use this stratagem in your Command phase.
Select one DEATHWATCH unit from your army,
then select one Chapter/Successor Tactic. Until
the end of the turn, models in that unit have that
Chapter/Successor Tactic instead of the Xenos
Hunters Chapter Tactic.