Thorough Planner Trait ID
The gain_xp trait ID for Thorough Planner in Hearts of Iron IV is thorough_planner.
Thorough Planner
Field MarshalAssignable Trait
Grant this trait to your selected commander with the gain_xp command and the trait ID thorough_planner.
About this trait
A strategic master mind. Given time, the well-laid plan will be the strongest.