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

Outflank

ARMY WAR ACTION
Activity 2 actions

Requirement Reckless Flankers, you aren't engaged

You send your army around an enemy's flank to get a better attacking position and to push your enemy into disorder. Attempt a Maneuver check check against the target army.

Critical Success The target army becomes Outflanked until the start of your next turn. You can choose to become Engaged with that army or not.

Success The target army is outflanked until the start of your next turn. You are now engaged with that army.

Critical Failure You underestimate the target army's position, and the blunder causes your army to become outflanked until the start of your next turn.

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