pf2e.fyi
From Pathfinder Kingmaker, which isn't enabled.

Counterattack

ARMY WAR ACTION
Activity reaction

Requirement Flexible Tactics
Trigger An army you are engaged with attempts a maneuver war action.

Your army lashes out at the foe as they attempt to perform a maneuver. Attempt a melee Strike against the triggering army's AC. Counterattack doesn't count toward your multiple attack penalty, and your multiple attack penalty doesn't apply to this Strike.

Critical Success You inflict 1 point of damage on the army and increase its Shaken condition value by 1.

Success You inflict 1 point of damage on the army.

Pathfinder KingmakerOGL