Absolutely nothing?!
I‘ve just begun reading the Players Guide and have stumbled over the Feint War Action.
Despite the missing check denomination, which has been mentioned in this forum; who is even going to try this utterly useless option?
You use one action to, if successful, induce a -2 to the opposing AC for your next attack the same round under a -5 MAP because of the actions Attack trait. Essentially Slowing 1 yourself for a -3 to hit. Advanced tactics, my word!
Or am I just not getting it?
In case I actually did get it, I would propose changing the Attack trait to Manoeuvre and checking the same.