Protective Screen
You've trained your allies in a technique designed to protect war mages. Signal one squadmate; as a reaction, that squadmate Strides directly toward any other squadmate who is within the aura of your banner. If the first squadmate ends their movement adjacent to another squadmate, the second squadmate does not trigger reactions when casting spells or making ranged attacks until the end of their next turn or until they are no longer adjacent to the first squadmate, whichever comes first. If the first squadmate ends their movement adjacent to more than one other squadmate, the first squadmate must choose which of the adjacent squadmates gains this benefit.
Traits
The brandish trait indicates an ability that involves you waving or otherwise actively displaying your banner. To use an ability that has the brandish trait, you must be holding your banner in one hand or wielding a weapon it is attached to. Since you have to be actively signaling with your banner to direct your squadmates while using a tactic with the brandish trait, you cannot use free actions or reactions granted as part of a brandish tactic unless specifically noted otherwise.
This trait indicates abilities from the commander class.