WHEN: The start of your Shooting phase or
the start of the Fight phase.
TARGET: Two or more Armiger models
from your army and one enemy unit
that is an eligible target for all of those
Armiger models.
EFFECT: Until the end of the phase, when
resolving attacks that target that enemy
unit, improve the Strength and Armour
Penetration characteristics of weapons
equipped by those Armiger models by
1. If your army is Honoured, until the
end of the phase, add 1 to the Damage
characteristic of those weapons as well.
You read it wrong, it does require you to target the selected enemy unit.