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

Overrun

ARMY TACTIC 3

Note: Basic cavalry armies know Overrun automatically, and must 'spend' their first tactic on it.


Cavalry armies gain a +1 status bonus on weapon attacks against infantry and skirmisher armies, but they suffer a –1 status penalty on Maneuver and Morale saves against area attacks and mental attacks.

Pathfinder KingmakerOGL