Static Warfare Idea ID
The add_ideas ID for Static Warfare in Hearts of Iron IV is static_warfare_spirit.
Static Warfare

division_command_spirit
Add this idea with the add_ideas command and the idea ID static_warfare_spirit.
Effects
While active, Static Warfare applies the following modifiers in Hearts of Iron IV:
- Additional Elastic Defense Tactic Chance if it is Preferred tactic+100%
- Max Entrenchment+10%
- Entrenchment speed+10%
About this idea
There is no such thing as too much trench work. There is only 'insufficient' and 'barely adequate'.