Quick clarification: does the Battle Action on False Trail override the Rule of Location and allow me to target an opponent's unit in an army not in the current battlefield?
False Trail clarification
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
The Rule of Location: This rule has two parts:
1. Any cards in units must be at the current battlefield to be legally targeted by a Battle action.
2. If a Battle action is on a card in a unit (a Personality or attachment in play), the unit must be at the current battlefield.
EXCEPTION: A Battle Action can target or be taken by a card in a unit at another location if its costs or effects say they can move the unit to the current battlefield. Choices within the action must then be taken, if possible, such that they do move the unit there.
Emphasis added. As long as you are moving it to the current battlefield, the exception will allow you to target a personality not at the current battlefield.
On: False Trail